ATOTO A5LG2B7T 7-inch 2-DIN Android Car Stereo Head Unit Operation Manual

Preface

Thank you for choosing ATOTO. With over a decade of expertise in automotive electronics, ATOTO remains committed to its core philosophy: Different. Better. Trusted.

• Different – We deliver products that stand apart through thoughtful design, innovation, and user-oriented features.
• Better - We integrate professional audio-visual technology with intuitive interaction to elevate every journey with superior experiences at an accessible price.
• Trusted - Endorsed by millions of users worldwide, ATOTO has earned a reputation for reliable products and responsive service you can count on.

This philosophy guides everything we do—from long-term R&D investment, to continuous product improvement, to prompt customer support. With ATOTO, you can always expect something different, something better, and above all, something trusted.

Copyright Notice

All copyrights and related intellectual property rights of ATOTO Android head unit manuals (both electronic and printed) are the exclusive property of ATOTO. No part of this manual may be reproduced, distributed, adapted, translated, mirrored, or reposted for commercial use, or shared with third parties, without prior written permission from ATOTO.

Permitted Use

These manuals are intended solely for customers who have purchased genuine ATOTO Android head units. Users may view, save, or print the content for personal use, provided that all copyright notices and product information remain intact. The content must not be used for technical support, marketing, training, or service activities related to non-ATOTO products.

Liability Notice

ATOTO reserves the right to take legal action against any unauthorized use, reproduction, or modification of this manual, or any infringement of ATOTO's copyright that results in disputes, financial loss, or harm to brand reputation. For authorization requests, content citation, or technical support, please contact ATOTO via official channels (Customer Service: support@atotodirect.com).

FCC Compliance Statement

The FCC Compliance Statement is an official declaration by ATOTO to users indicating that the product complies with the radio frequency interference and electromagnetic compatibility (EMC) regulations of the U.S. Federal Communications Commission (FCC). This device strictly complies with all provisions of Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device must not cause harmful interference; 2. This device must accept any interference received, including interference that may cause undesired operation.

Contact ATOTO Customer Support

If you encounter any issues during installation or use, our support team is ready to assist. Email: support@atotodirect.com.

1. Important Information

To ensure proper use of your new ATOTO Android head unit, please be sure to read this user manual thoroughly and understand its contents fully. Keep it in a safe place for future reference.

This manual is applicable to all ATOTO A5L Series head unit models. Newly released A5L models may have extra functions that are not mentioned. The list of accessories and the back panel may vary slightly depending on the specific model and the region of sale, but the system, UI, and product hardware information remain consistent. The screenshot images provided in this manual may be different from what's displayed on the current system. ATOTO may release new system updates, which may include changes made or newly added functions that are not mentioned here. The information in this manual may be insufficient. If you have any questions or problems concerning your unit that are not covered in this manual, consult customer support.

1.2. Operation Warnings

1.2.1. Important Safety Information to Know Before Use

To ensure your personal safety and prevent hazards such as fire, please strictly observe the following precautions, and immediately take appropriate action if any abnormal product behavior occurs:

1. Avoid Short Circuits and Electric Shock

   Do Not Place Metal Objects: Do not place or leave any metal objects, such as coins or metal tools, inside this product. This prevents metal objects from causing a short circuit, which may damage the product.

   Prevent Liquid Contact: Do not allow this product to come into contact with any liquid. Liquid contact may cause overheating, smoke, or other abnormal conditions, which can not only damage the product but may also cause electric shock and pose severe risks to personal safety.

   Emergency Handling Method: If liquid or foreign objects accidentally enter the interior of this product, do not use the product in this condition. Immediately park the vehicle in a safe location and turn off the ignition switch (ACC OFF) to cut off the power supply. Promptly contact ATOTO Customer Service or your dealer for professional assistance.

2. Immediate Action Required for Product Abnormalities:

   Do not use the product if any abnormalities occur, as continuing to use it may result in product malfunction, permanent damage, fire, or even endanger personal safety. If the product has the following abnormalities, please take immediate action:

   • Description of Abnormalities: If the product emits smoke, unusual sounds, or odors, or if the screen displays abnormally, etc.
   • Handling Method: Immediately turn off the power and consult ATOTO Customer Service or your dealer for assistance.

1.2.2. Important Safety Information for Critical Driving Instructions

To ensure your personal safety, please read and thoroughly understand the following important safe driving instructions before using this product.

• Compliant Driving: Always follow safe driving practices and comply with all applicable traffic regulations. If you encounter difficulties while operating this product, pull over to a safe location, park your vehicle securely, and engage the parking brake before making any necessary adjustments.
• Stay Focused While Driving: Always keep your full attention on the road while driving. Do not stare at the device screen or operate the entertainment system. If you need to make any adjustments, pull over safely and ensure the vehicle is completely stopped before proceeding.
• Be aware of Road Conditions: Avoid operating this product under hazardous road conditions and comply with regulations displayed on the map information. Always adhere to traffic restrictions and actual road conditions while driving.
• Operating the Product while Driving is Dangerous: If you need to operate any function for an extended period, stop the vehicle completely and ensure it is in a safe location before doing so.
• Operate at Safe Volume Levels: Excessive volume may prevent you from hearing emergency vehicle sirens or road warning signals, posing a safety risk and possibly leading to accidents. High volume may also result in hearing loss.
• Do Not Watch Videos While Driving: Do not watch or operate video functions while driving, as this seriously distracts the driver and may result in accidents. The manufacturer shall not be liable for any personal injury, property loss, or damage resulting from distracted operation of video functions while driving.
• Minimize Operation While Driving: Do not enter text, adjust settings, or operate other navigation system functions while driving. These operations should only be performed when the vehicle is safely and legally parked.
• Environmental Conditions: Please pay attention to environmental temperatures. Using the navigation system under extremely high or low temperatures may result in malfunctions or damage. In addition, the product may be damaged by severe vibrations, metal objects, physical impact, or water ingress.
• Avoid Battery Drain: When using this product, please ensure that the vehicle engine is running. Using this product without starting the engine may drain the vehicle's battery. Do not install this product in vehicles without an ACC circuit or power line.

2. Screen Use and Maintenance

This product uses a capacitive touchscreen, similar to those used in mobile devices (such as smartphones). Please use and maintain this product as you would a mobile device.

2.1. Capacitive Touchscreen User Guide

• Do Not Operate the Screen with Wet Fingers: If your fingers are wet or sweaty, the touch function may not operate properly.
• Avoid Prolonged Exposure to Sunlight: Do not leave the screen exposed to direct sunlight when not in use, as prolonged exposure to high temperatures may lead to screen malfunction or permanent damage.
• Avoid Pressing the Screen with Excessive Force: To avoid screen damage, operate the touchscreen keys with gentle finger touches only.
• Avoid Contact with Sharp Objects: Do not use ballpoint pens or other sharp objects to operate the screen to prevent damage.

2.2. Screen Cleaning Instructions:

• If there is dirt on the device screen or panel, wipe the surface with a dry, soft cloth (such as a silicone cloth).
• For stubborn stains, use a cloth moistened with a neutral detergent to clean the screen and panel, then wipe dry with a soft, dry cloth.
• It is best to clean the screen when the device is powered off, cooled down, and not exposed to direct sunlight.

Notes:

1. Do not use ammonia, glass cleaners, or any types of household chemicals to clean the screen and panel. Never use abrasive cleaners.
2. Do not spray cleaners directly onto the screen or panel to avoid damaging internal components.
3. Avoid using hard cloths or volatile liquids (such as thinners or alcohol) to clean the screen and panel as these may scratch the surface or erase printed text.

2.3. Notice

The ATOTO A5LG2B7T supports Apple CarPlay and Android Auto.

• Apple CarPlay is a trademark of Apple Inc. iPhone® is a trademark of Apple Inc., registered in the U.S. and other countries. Use of the Apple CarPlay logo means that this user interface meets Apple performance standards. Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards. ATOTO is not affiliated with Apple Inc.
• Android Auto is a trademark of Google LLC.
• The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by ATOTO are under license. Other trademarks and trade names are those of their respective owners.

3. Physical Hardware Overview

This chapter explains the purpose and functionality of each button and interface on the front panel and rear panel, helping you navigate and use the device more efficiently.

3.1. Front Panel Overview (A5LG2B7T)

Image: ATOTO A5LG2B7T Front Panel with various controls and display.

The A5LG2B7T model features the following front panel controls:

1. Built-in Microphone: Used for Bluetooth Hands-free and Voice Commands.
2. Off-screen: Press to manually turn off the screen audio output.
3. Home Key: Press one time to return to screen.
4. Volume Adjust: Increase or decrease the audio volume.
5. Voice Assistant: Press and hold it to wake up the voice assistant.
6. Reset the system circuit: This option can be applied when the system fails to work properly (boot failure, system stuck unexpectedly, and so on).

3.2. Rear Panel Ports and Wiring

Image: Rear panel port map and cable identification for ATOTO A5LG2B7T.

This diagram shows the rear side of the car stereo. The left side has a group of RCA plugs and small signal leads. The top edge has several rectangular multi-pin sockets. The right side has the HDMI port and two round antenna ports. The bottom shows a 3.5 mm jack for steering wheel controls and a 16-pin connector illustration.

Left-side RCA plugs and small leads (functions):

• SUB (Subwoofer Out): RCA audio output for a subwoofer amplifier.
• FR (Front Right Audio Out): RCA audio output, front right channel.
• FL (Front Left Audio Out): RCA audio output, front left channel.
• RR (Rear Right Audio Out): RCA audio output, rear right channel.
• RL (Rear Left Audio Out): RCA audio output, rear left channel.
• VIN (Video Input): video input lead.
• LIN (Left Channel Auxiliary Input): AUX audio input, left channel.
• RIN (Right Channel Auxiliary Input): AUX audio input, right channel.
• MIC (External Microphone Input): input for an external microphone.
• Amplifier Turn-on (+): remote turn-on/trigger lead for an external amplifier.

Top-edge rectangular sockets (functions shown in the figure):

• External Storage: connection used for external storage.
• Phone Link (Android Auto/CarPlay/MirrorLink): connection used for phone-link features.
• For connecting ATOTO CANBUS decoder boxes: port used to connect ATOTO CANBUS decoder boxes.
• Empty: a socket shown as not used (no connection).

Top-right small harness leads (functions):

• RCIN (Rear Camera Input): rear camera video input lead.
• Bluetooth Antenna (No Wiring Needed): Bluetooth antenna is built-in; no wiring needed.
• Wi-Fi Antenna (No Wiring Needed): Wi-Fi antenna is built-in; no wiring needed.
• Parking Brake (-): parking brake signal lead (negative).

Right-side ports on the unit body:

• HDMI: HDMI port.
• GPS Antenna: round GPS antenna input labeled “GPS”.
• ANT (Radio Antenna Input): round radio antenna input labeled "ANT”.

Bottom area:

• Steering Wheel Audio Control 3.5mm Jack (If applicable): 3.5 mm jack used for steering wheel audio control interface, if the vehicle/system supports it.
• A 16-pin connector layout is illustrated (pin numbers are shown in the picture, but no pin functions are listed in this figure).

4. Home Screen Overview

The Home Screen is the primary interface of the unit. It provides quick access to essential functions, displays real-time information, and supports layout customization. The modular design is optimized for ease of use and to help minimize driver distraction.

4.1. Home Screen Layout

The Home Screen is divided into three functional areas: the Status Bar, the Main Interface Area, and the Dock Bar.

• Status Bar (at the Top Right of the User Interface: Area A): Displays essential system information such as time, volume, and network status. It also provides quick access to brightness and volume controls.
• Main Interface Area (Customizable Display Widget: Area B): Shows the music player widget on the left and app shortcuts on the right (Web Resources, Gallery, AUX, Equalizer, SWC Setup, DVR CAM). Serves as the primary interaction area with a card-based layout for clear information display and quick access. Supports customization: rearrange widgets and shortcuts to create a personalized layout.
• Dock Bar (Fixed at the Bottom of the home screen: Area C): Provides quick shortcuts to commonly used functions. The center App Drawer (Area D) icon opens the full list of installed apps, organized across multiple pages for easy browsing.

4.2. Quick Settings Panel (Control Center)

The Quick Settings Panel serves as the integrated control center. Swipe down from the top of the Status Bar to open it. It provides instant adjustment for frequently used functions and mainly includes the following modules: network and connection, volume adjustment, screen brightness adjustment, etc.

Touch Buttons Icons and Their Functions:

1. Screen off: Tap once to turn off the display while the system keeps running in the background (music, navigation, etc. continue).
2. Reboot: Tap once to restart the head unit system, useful for refreshing performance or fixing temporary issues. A confirmation prompt will appear, and the system will reboot only after you confirm.
3. MUTE: Tap once to instantly mute all sounds from the device. Tap again to unmute.
4. Wi-Fi: Tap once to turn Wi-Fi on or off; press and hold to open Wi-Fi settings for selecting or managing networks.
5. Screenshot: Tap once to capture the current screen display as an image.
6. Settings: Tap once to open the main Settings menu for system and device configuration.
7. Brightness Adjustment: Slide the bar left or right to decrease or increase screen brightness.
8. Volume Adjustment: Slide the bar left or right to decrease or increase system volume.

5. Internet Connectivity Options

The A5L offers three methods for connecting to the internet. Select the option that best suits your needs, driving scenario, and data plan:

1. WiFi: Connect to an external Wi-Fi network or mobile hotspot.
2. Bluetooth Tethering: Share your smartphone's internet connection via Bluetooth.
3. USB Tethering: Share your smartphone's internet connection using a USB cable.

5.1. WiFi Connection

The A5L Android head unit supports both 2.4GHz and 5GHz WiFi networks.

Operation Steps

1. Create a Hotspot: Use your smartphone or a portable router to set up a WiFi hotspot.
2. Enable WiFi: On the head unit, go to Settings > WLAN and enable Use Wi-Fi.
3. Select Network: Choose your WiFi network name from the list of available networks.
4. Enter Password: Input the WiFi password and tap Connect.

5.2. Bluetooth Tethering

Bluetooth Tethering allows the A5L head unit to access the internet using your phone's mobile data using a Bluetooth link. This option is useful when WiFi is not available.

Operation Steps (For Android Phones)

1. Turn off WiFi on both your phone and the head unit.
2. On your phone, enable Mobile Data, Bluetooth, and Bluetooth Tethering (Typical path: Settings > Connection & Sharing > Personal Hotspot > Bluetooth Tethering).
3. From the Home Screen, tap the "App Drawer icon" to open the apps list and select the Bluetooth app.
4. Tap the "Bluetooth icon" to open Bluetooth settings on the head unit.
5. Tap "Search" to search for available devices.
6. Select your phone from the Available Devices list and tap it to pair.
7. Enable Internet access for Bluetooth tethering.
8. Verify the internet connection by opening a website using the Chrome browser on the head unit.

Operation Steps (For iPhones)

1. Turn off WiFi on both your phone and the head unit.
2. Enable Bluetooth, Mobile Data and Personal Hotspot on your iPhone.
3. Follow steps 3-8 as outlined for Android phones.

5.3. USB Tethering

USB tethering allows the A5L head unit to share your phone's mobile data via a USB cable. This method provides a more stable and faster internet connection compared to Bluetooth tethering.

Operation Steps (For Android Phone)

1. On your phone, locate Developer Options and enable USB Debugging.
2. On the A5L head unit, open the Zlink6 app.
3. Scan the QR code displayed on the A5L screen to download and install the app on your phone.
4. Connect your phone to the A5L head unit using the original USB cable and approve any prompts on your phone.
5. Launch the Zlink6 app on both the head unit and your phone.
6. Test the internet connection by opening a website using the Chrome browser on the head unit.

Operation Steps (For iOS Phone)

1. On the A5L head unit, open the Zlink6 app.
2. Scan the QR code to download and install the app on your iPhone.
3. Connect your iPhone to the A5L head unit with the original USB cable and approve any prompts.
4. Launch the Zlink6 app on both the head unit and your iPhone.
5. Verify the connection by browsing a website using Chrome on the head unit.

Notes:

• Once USB tethering is active, screen mirroring runs in the background, without interrupting internet connectivity.
• Always use the original USB cable for stable data transfer.
• Compared to Bluetooth tethering, USB tethering generally provides higher speed and stability.

6. CarPlay & Android Auto Connectivity

The A5L Android head unit both supports wired and wireless connection via the Zlink6 app with your iPhone or Android smartphone. It allows you to mirror key smartphone functions—such as navigation, phone calls, and music playback onto the A5L Android head unit's display, improving driving safety and convenience.

Key Features:

1. Dual Platform Compatibility: Supports Apple CarPlay for iPhone and Android Auto for Android smartphones.
2. Wired and Wireless Connectivity: Connect via USB or wirelessly via Wi-Fi (and Bluetooth pairing if needed) for flexible device mirroring.
3. Core App Projection: Displays key apps such as navigation, phone, and music to the car display.

Preparation Requirements:

1. Please ensure that both your smartphone and the head unit are updated to a version that supports Apple CarPlay or Android Auto.
2. Before connecting, you can open the Zlink6 app.

6.1. Apple CarPlay Connection

The A5L supports both Wired and Wireless Apple CarPlay, seamlessly integrating your iPhone for a smarter and safer in-car experience.

6.1.1. Compatibility

• Wired CarPlay: iPhone 5 or later with iOS 7.1+
• Wireless CarPlay: iPhone 5 or later with iOS 9.0+

6.1.2. Wired Apple CarPlay

The Wired Apple CarPlay Connection feature of the A5L Android head unit allows your iPhone to connect directly via a USB cable, enabling Apple CarPlay functionality and providing a convenient, safer, and smarter in-car experience.

• Prerequisite: Ensure the vehicle is in Park (P) before starting.

Operation Steps

1. Connect your iPhone to the A5L head unit using the original Apple USB cable via the port labeled Phone Link.
2. Launch the Zlink6 app on the head unit and approve any prompts on your iPhone.
3. The CarPlay interface will appear on the screen automatically.

6.1.3. Wireless Apple CarPlay

The Wireless Apple CarPlay Connection feature of the A5L Android head unit enables seamless wireless connectivity between the iPhone and the car system, realizing the Wireless Apple CarPlay function and providing a more convenient, safer, and smarter in-car connectivity experience.

• Prerequisites:
  1. Ensure the vehicle is in Park (P) before starting.
  2. iPhone and A5L must not be connected to other Wi-Fi or Bluetooth-enabled devices.
  3. Enable Wi-Fi and Bluetooth on both the iPhone and the A5L.

Operation Steps

1. Tap the Bluetooth (Bluetooth Phone App Icon) to enter Bluetooth pairing interface, then tap (Bluetooth connection icon) to view the car stereo's Bluetooth name. (default name:A5L)
2. Tap the Bluetooth Connection icon to enable "Auto Connect". Enable Bluetooth and Wi-Fi on your iPhone. Then, find the A5L Android head unit's name. This is the name your iPhone will search for and pair with.
3. On your iPhone, select the A5L's Bluetooth name and tap Pair. Approve all prompts.
4. Launch the Zlink6 app on the A5L and follow any on-screen prompts on your iPhone.
5. Once connected, the system will automatically enter Wireless Apple CarPlay mode. If not, open the app CarPlay/AA manually.

6.1.4. Important Notes (CarPlay)

1. There is no need to manually select the A5L Android head unit from the phone's Wi-Fi list; once Bluetooth pairing is completed, it will automatically connect via Wi-Fi.
2. Wi-Fi network connections are not supported while using Wireless Apple CarPlay.
3. This manual provides basic setup instructions. For detailed Wireless Apple CarPlay features and usage, visit Apple's official site: iOS - CarPlay - Apple.

6.2. Android Auto Connection

The A5L supports both Wired and Wireless Android Auto, allowing you to connect your Android smartphone for convenient access to navigation, music, and hands-free communication while driving.

6.2.1. Compatibility (Android Auto)

• Wired Android Auto: Available on Android phones running Android 6.0 or higher.
• Wireless Android Auto:
  1. Supported on any phone with Android 11.0 or higher.
  2. Supported on Google or Samsung phones running Android 10.0.
  3. Supported on Samsung Galaxy A5L, Galaxy A5L+, and Note 8 with Android 9.0.

6.2.2. Wired Android Auto

• Prerequisites:
  1. Ensure the vehicle is in Park (P) before proceeding.
  2. When setting up Android Auto for the first time, your phone may display a message such as "The vehicle must be parked to continue setup". This occurs because Android Auto requires the parking brake signal to confirm that the vehicle is stationary. Ensure the parking brake wire from the head unit is correctly connected to the vehicle's parking brake circuit. If the wire is left unconnected (floating), Android Auto may not complete the setup process.

Operation Steps

1. Install the Android Auto app on your Android phone. If it cannot be installed from the GooglePlay Store, your phone may not support Android Auto or the service may not be available in your region.
2. Use your phone's original USB data cable to connect it to the car stereo via the included Phone Link USB Port.
3. Tap Zlink6 app on the car stereo and allow any prompts on your phone to complete the setup.
4. For the first-time connection, your phone may display pop-ups—always allow these requests.
5. Once setup is complete, the Android Auto Interface will appear on the A5L screen.

6.2.3. Wireless Android Auto

The Wireless Android Auto Connection feature of the A5L Android head unit enables seamless wireless connectivity between the Android Smart phone and the car system, realizing the Wireless Android Auto function and providing a more convenient, safer, and smarter in-car connectivity experience.

Prerequisites:

1. Ensure the vehicle is in Park (P).

Operation Steps

1. Install the Android Auto app on your Android phone. If it cannot be installed from the Google Play Store, your phone may not support Android Auto or the service may not be available in your region.
2. Tap the Bluetooth Phone app Bluetooth to enable "Auto Connect". Enable Bluetooth and Wi-Fi on both your Android phone and the A5L. Then, tap Bluetooth Settings icon to find the A5L Android head unit's name. This is the name your Android phone will search for and pair with.
3. Find the A5L's Bluetooth name (default: A5L) and tap to pair. Then, tap to allow the prompts (if prompted) and "Pair” to complete the Bluetooth connection on your Android Phone.
4. Tap Zlink6 app on the A5L and allow any further prompts on your phone to finish setup. Then Android Auto Interface will display on the A5L screen.

6.2.4. Important Notes (Android Auto)

1. Wi-Fi as internet access is not supported when using wireless CarPlay.
2. When using wireless Android Auto, we recommend connecting to the internet via the Bluetooth.
3. Ensure your phone and car stereo do not connect to any other Wi-Fi hotspots or Bluetooth, and make sure your car is in park(P).
4. No need to manually select the car stereo from your phone's Wi-Fi list; it connects automatically via Wi-Fi after Bluetooth pairs.
5. This section provides basic setup instructions. For full Android Auto features and usage, visit the official site: https://www.android.com/auto.

7. Phone Mirroring

The A5L Android head unit supports wired and wireless Phone Mirroring via the Zlink6 app. Unlike Apple CarPlay or Android Auto, it mirrors the entire phone interface, allowing full access to apps, videos, games, and other content directly from your phone.

Key Features:

1. Full Screen Mirroring: Mirrors the entire phone interface on the A5L display.
2. Wired & Wireless Support: Connect via USB cable or Wi-Fi/Bluetooth.
3. Real-Time Interaction: Operate apps, games, and multimedia on your phone in real time using the A5L touch screen.
4. Compatibility: Works with most Android and iOS devices; app installation on the phone may be required.

Note: The mirroring function cannot reverse control the mobile phone.

7.1. USB Wired Mirroring for iPhone

Operation Steps

1. Use your iPhone's original USB data cable to connect it to the A5L. Trust the car stereo on your iPhone and accept any prompts.
2. Open Zlink6 app on the car stereo. On your iPhone, tap Screen Mirroring, select the car stereo's ID, and the connection will be established.

Note: When your phone is connected to the car stereo using Zlink6 via USB, the stereo can access the internet using your phone's data.

7.2. Wi-Fi Wireless Mirroring for iPhone

Operation Steps

1. On your iPhone, navigate to Settings > Personal Hotspot and enable it. Note the hotspot password.
2. On the A5L, navigate to Settings > WLAN > Wi-Fi. Select your iPhone's hotspot from the list and enter the password to connect.
3. On your iPhone, tap Screen Mirroring, select the car stereo's ID, and the connection will be established.

7.3. USB Wired Mirroring for Android Phone

Operation Steps

1. Install Zlink6. APK: Download from Google Play Store. Alternatively, you can open Zlink6 on the car stereo, select the Android option, and scan the QR code with your phone to download Zlink6.
2. Enable USB Debugging: Find this in system Developer Options. If unsure, search online for your specific phone model.
3. Connect your phone to the car stereo's USB "Phone Link" port. Accept any prompts on your phone and open the Zlink6 app on the car stereo.

7.4. Wi-Fi Wireless Mirroring for Android Phone

After connecting via USB, if the car stereo and your Android phone are on the same Wi-Fi network, you can unplug the USB for wireless Phone Mirroring.

7.5. Important Notes (Phone Mirroring)

• USB Tethering: When a smartphone is connected to the car stereo via Zlink6 using a USB cable, the head unit can access the internet through the smartphone's data connection.
• For Android phones, the operation system must be Android 4.4 or higher.
• Wireless Phone Mirroring over Wi-Fi doesn't consume mobile data.
• For the best mirroring experience, enable the Automatic Screen Rotation of your smartphone. (Some apps may not support landscape mode.)
• On smartphones with curved screens, black edges may appear around the display. This is caused by the phone's firmware, not the A5L or Zlink6 app.

8. DriveChat App (AI Voice Assistant)

The A5L Android head unit comes pre-installed with the DriveChat application, an innovative AI voice assistant powered by SSHub and ChatGPT. This DriveChat enables users to control the A5L Android head unit via voice commands and interact with multiple AI chatbots.

8.1. Introduction to DriveChat & SSHub App

• DriveChat Functionality: Enables voice commands for controlling A5L Android head unit functions (e.g., music playback, navigation) and offers interaction with various AI chatbots for information or assistance.
• SSHub Companion App (Required): You must use your smartphone to download and use the SSHub app (available on the App Store/Google Play) for:
  1. Creating and managing your required ATOTO account.
  2. Configuring DriveChat settings (e.g., wake words).
  3. Syncing settings between your phone and the A5L Android head unit.
  4. Managing potential paid features or premium AI models for DriveChat (check within the SSHub app for details).
• Potential Costs: Be aware that using certain advanced DriveChat features or specific AI models may require purchases managed through the SSHub app.

8.2. Setting Up DriveChat (Account & Wake Words Configuration)

Overall Process: Download SSHub app -> Create/Login ATOTO Account -> Download and Access DriveChat (Link A5L to SSHub Account via QR Scan) -> Set Wake Words.

Operation Steps (Step 1: Download & sign in to SSHub)

1. Download the SSHub App from the App Store (iOS) or Google Play Store (Android).
2. Open SSHub, then sign in with your existing account or create a new one if you don't have one. Make sure you are successfully signed in before proceeding.

Operation Steps (Step 2: Download and Access DriveChat App (Link A5L to SSHub Account via QR Code Scan))

1. By default, the DriveChat app comes pre-installed on the A5L Android head unit. If it is not pre-installed, please download it via FindApps, the built-in app management tool on the A5L.
2. On the A5L Android head unit, enable the DriveChat app.
3. The DriveChat app interface will display a QR code.
4. On your smartphone, open the SSHub app, tap Scan Now, and scan the QR code displayed on the A5L's DriveChat interface to link your SSHub account with DriveChat.
5. After linking, go to Mine(bottom tab) → My Devices → [Select your A5L] → Device Name → Edit device name(enter a name)→ Confirm to rename your device.

Operation Steps (Step 3: Set Wake-Up Words)

1. In the SSHub app, navigate to the settings of your added A5L device (likely under a "Manage" or "Device Details" section).
2. Find the option to set wake-up words, then tap "+ New Wake Word" to start the setup.
3. Enter your preferred wake-up word and tap “Start” to begin recording. Repeat this step until a checkmark (√) appears. Then tap “Confirm” to complete the recording. The wake-up word is now saved.

Notes:

1. You must set at least two distinct wake-up words: one for voice control commands (e.g., "Hey Mojo") and one for initiating conversations with the Chatbot (e.g., "Hey Piko").
2. The DriveChat (AI Voice Assistant) can process only one command or conversation at a time. Please wait for the current interaction to finish before proceeding with the next one.
3. DriveChat is better at recognizing the voice of the person who recorded the wake-up word. If multiple people will be using the system, it is recommended that each person records their own wake-up word using their own voice. Avoid using common phrases or names as wake-up words to prevent accidental activation.
4. Follow the prompts to choose or customize your wake-up words.

8.3. Using DriveChat (Voice Control & Chatbot)

DriveChat is an A5L Android head unit application that integrates voice interaction and intelligent assistant functions. Its purpose is to allow users to interact with the A5L Android head unit more safely, efficiently, and naturally while driving. Below are the main features and advantages of DriveChat:

1. Personalized Wake Words: Each user can record their own custom wake words: for voice control commands (e.g., "Hey Mojo") and for chatbot interaction (e.g., "Hey Piko"). Custom wake words improve accuracy and reduce accidental activations.
2. Voice Control of Head Unit Functions: You can control the A5L with simple voice commands. Examples: User: "Hey Mojo, turn on the Radio." DriveChat (Mojo): "Radio turned on for you." User: "Hey Mojo, skip to the next track." DriveChat (Mojo): "Skipping to the next track."
3. Conversational Interaction: Use DriveChat as a companion for fun and engagement. Example: User: "Hey Piko, tell me a joke." DriveChat (Piko): "Sure! Why don't scientists trust atoms? Because they make up everything!"
4. AI Chatbot for Advice: Use DriveChat as a companion for fun and engagement. Example: User: "Hey Piko, how can I write a compelling novel introduction?" DriveChat (Chatbot - Novelist Mode): "Start with an intriguing question, a vivid description, or a dramatic event..."

8.3.1. Activate DriveChat

By using wake words to activate DriveChat, you can trigger different functions of the system in various scenarios. For example:

1. To initiate a simple conversation, say: "Hey Piko, please tell me what the highest mountain in the world is."
2. To switch to a professional chatbot role, say: "Hey Mojo, switch to novelist mode," and then receive expert advice on novel writing techniques. In this context, "Hey Mojo" serves as the control wake word. After DriveChat switches to the novelist role, you should use "Hey Piko" to continue the conversation.

Note: "Hey Piko" is used here as an example for dialogue interaction, and "Hey Mojo" as an example for control functions.

8.3.2. Configuring the Chatbot Settings

Before using the chatbot feature of DriveChat on the A5L Android head unit, it is typically necessary to pair and configure it using the pre-installed DriveChat App on the head unit and the SSHub App on your smartphone. The following is the standard setup procedure:

Preparation Requirements: Ensure the following conditions are met:

1. The head unit is connected to the internet (via 4G, Wi-Fi, or mobile hotspot).
2. The SSHub App is installed and logged in on your smartphone.
3. The DriveChat App is pre-installed on the head unit or downloaded via FindApps.

Operation Steps (Step 1: Log in to SSHub on Your Smartphone)

1. Open the SSHub App on your smartphone (available on the App Store or Google Play).
2. Log in with your ATOTO account, or sign in using a supported third-party account (e.g., Google).

Operation Steps (Step 2: Pair the A5L Android Head Unit with SSHub App)

1. Open the DriveChat App on the head unit. A QR code will be displayed.
2. In the SSHub App on your phone, tap "Add Device" (the "+" icon), then tap the "Scan" button to scan the QR code displayed on the DriveChat interface to access DriveChat.
3. After scanning the QR code, set a device name and tap "Confirm" to complete the pairing.

Operation Steps (Step 3: Configure the Chatbot)

1. From the SSHub App on your phone, tap DriveChat to enter the chatbot configuration interface.
2. Tap to View All Available Chatbots.
3. Select the desired chatbot, then tap “1. Use on Car Stereo" to activate it.
4. In the "Mine" list, toggle the chatbot on or off to enable or disable it on the A5L Android head unit.

9. Navigation

The A5L car stereo is equipped with a built-in GPS chip, enabling navigation functions without the need for a smartphone or mobile data connection. For best results, offline maps should be downloaded and stored in advance. To use this feature, simply download offline maps in advance.

9.1. GPS Antenna Setup

The car stereo has a GPS positioning chip inside, and a GPS antenna port is provided at the rear (labeled GPS). Connect the GPS antenna to the back of the car stereo before turning it on.

Image: GPS Antenna connection and TrackHU app interface.

9.2. Online Navigation

Google Maps comes installed on the car stereo. Remember, you need an internet connection to navigate in real-time. Apart from Google Maps, you can find more GPS navigation maps from Google Play Store.

9.3. Offline Maps

The stereo comes with Google Maps pre-installed, which requires an active internet connection for real-time navigation. You may also install other GPS apps from the Google Play Store, giving you the option to use either online or offline navigation depending on your needs.

Notes:

1. Offline navigation requires pre-downloaded map data. Ensure that maps are installed before using navigation without an internet connection.
2. Availability of offline maps may vary by region. It is recommended to confirm map availability for the intended area before relying on offline navigation.

10. FM/AM Radio App

The FM/AM radio integrates advanced radio reception technology and user-friendly interactive design. This functionality supports dual-band reception (FM frequency modulation and AM amplitude modulation), equipped with RDS (Radio Data System), AF (Automatic Frequency Switching), and TA (Traffic Announcement) capabilities. It offers comprehensive station management and enhanced listening features, enabling users to access music, news, and real-time traffic information, thereby fulfilling diverse listening needs.

10.1. Radio Home Screen Interface

Image: FM/AM Radio interface showing frequency, presets, and controls.

Operation Introduction

1. Navigation Path: Home Screen > APP Drawer > Radio App
2. AF (Alternative Frequency): Tap to automatically searches and switches to the strongest frequency of the current station to maintain uninterrupted reception (FM only).
3. TA (Traffic Announcement): Tap to enable switching to traffic announcements automatically when it is broadcast.
4. PTY (Program Type): Tap the PTY button to enter the program type list, showing different categories of stations (e.g., News, Music, Sports, Traffic). Tap a category, and the radio will automatically search for and play stations of that type.
5. TP: Enable this option means turning on TP (traffic programs).
6. Auto Seek Tuning Button: Tap to perform non-stop seek tuning to search for stations and store FM or AM stations.
7. RDS Feature: Enable the Radio Data System (RDS) for traffic announcements (TA) and traffic programs (TP). This feature works if local stations broadcast RDS signals; otherwise, standard FM/AM is available.
8. Search button: Performs non-stop seek tuning.
9. AM/FM switch button: Shift between FM and AM stations.
10. AF/REG Smart Tuning: Automatically switches to the best frequency and lets you keep or change the region.

Note: The RDS feature does not include Traffic Message Channel (TMC) services, but you can use Google Maps for traffic information.

10.2. Radio Settings

Radio Settings is used to enable or disable the RDS feature and configure radio regions to match broadcasting standards in different countries—all aimed at enhancing user convenience and overall listening experience.

10.2.1. Radio Area Settings

Operation Introduction

• Navigation Path: Settings > Car setting > General > Radio Region

Set Radio Region

The radio function of the A5L Android system supports the following regions: USA, Europe, Latin, Eastern Europe, China, South America, and Japan. Ensure you choose the correct radio region to match your location for optimal station reception. If you reset the A5L Android head unit, you'll need to manually reselect your region to ensure proper functionality.

11. Equalizer App (Customize Audio Experience)

This chapter systematically elaborates on the core functions of in-car audio effect adjustment. Its built-in digital signal processor (DSP) allows for extensive audio customization via the equalizer application. Through multi-dimensional audio control technology, it provides users with a comprehensive end-to-end audio optimization solution, ranging from basic tuning to in-depth customization, adaptable to different music genres, in-car spatial layouts, and personalized listening preferences.

11.1. Mode Selection & EQ Presets

The system comes pre-set with 9 sound effects: News, Jazz, City, Pop, Electronic, Classic, Movie, Rock, Techno.

User Mode: It allows for customization, users can adjust the 48-band EQ from 16Hz to 18kHz according to personal preference and save up to three user modes.

Reset button: The Reset button restores user mode settings when clicked.

Image: Equalizer interface showing 24-band EQ and presets.

Frequency Band Adjustment: Each slider represents a frequency (shown at the bottom: 20, 24, 29... Hz). Drag the slider up or down to adjust gain. Numbers above each slider indicate the current gain in dB (positive or negative).

Operation Steps

1. Access EQ: Navigate to Home Screen > APP Drawer > Equalizer (EQ) App
2. Set EQ Preset: Tap the EQ preset name (e.g., "News") in the top left corner to choose from various pre-configured sound effects (like Rock, Classic, Jazz, etc.) tailored for different music genres.
3. Set Custom EQ Effects:
   1. Manual Mode: When "USER 1," " USER 2," or " USER 3" is selected, manual mode can be used, allowing for custom adjustments.
   2. Adjust the Frequency via the slider or the curve: Users can adjust each frequency band (typically from 20Hz to 20kHz) either by moving the slider or by dragging the curve at the desired point; moving upward boosts the frequency, while moving downward reduces it. All changes are reflected in real time on the frequency response curve, providing an intuitive view of the audio adjustments.

11.2. Sound Field (Listening Position)

Select your preferred listening spot from five options or preset positions for optimal audio.

11.3. Sound Field Output Settings

This feature creates a personalized intelligent sound space for you, automatically optimizing sound effects based on the distribution of people in the car and driving scenarios, providing each passenger with a customized immersive auditory experience.

Individual speaker output settings allow for separate adjustments based on each speaker's power requirements and phase.

• Mute: Offers control over whether to mute or reduce the volume output for each speaker's sound field, adjustable from 0 to -15dB.
• Invert: Provides control over whether each sound field is phase-inverted.
• Link/Unlink Channel Linkage Adjustment Button: Provides control over whether the left and right sound fields are simultaneously phase-inverted or muted. After clicking, both volume levels can be adjusted simultaneously. Taping again to unlink the speakers allows you to adjust the volume of a single speaker individually.
• Link (Enabled): Adjusting the Gain/EQ/Delay of the Left Front will simultaneously change the Right Front. Adjusting the Left Rear will cause the Right Rear to follow.
• Unlink (Disabled): You can independently adjust the parameters of each side (e.g., adjust the Left Front independently without affecting the Right Front).

11.4. Crossover

• Filter Button: Provides sound field filtering channels. FL/FR/RL/RR offer filtering from 20Hz to 20KHz, with Slope control from 0 to 42dB. The subwoofer provides filtering from 20 to 400Hz, with Slope control from 0 to 42dB. HPF = High Pass Filter, LPF = Low Pass Filter.
• Bass Boost Settings: FL/FR/RL/RR/Subwoofer can enhance specific frequency points from 20Hz to 400Hz.

Reset button: The Reset button restores user mode settings when clicked.

11.5. Time Correction

Time Correction in car stereos adjusts the timing of sound coming from each speaker so that all sound reaches your ears at the same time, regardless of how far each speaker is from you, providing balanced audio that centers you in the music. Adjustments range from distance (0-680cm) or time delay (0.0-20msec) of each speaker.

Key features:

1. Delay Display (FL/FR/RL/RR): Shows delay time (milliseconds) and corresponding distance (centimeters) for each speaker.
2. FL: Front Left speaker
3. FR: Front Right speaker
4. RL: Rear Left speaker
5. RR: Rear Right speaker
6. Time (ms): Indicates the delay applied to the speaker relative to the reference listening position.
7. Distance (cm): Represents the physical distance between the speaker and the listener.
8. Adjustment Buttons: Tap the +/- buttons to set the delay value for each speaker. You can modify these values using the adjustment buttons. The system updates these values in real time, enabling precise calibration of sound arrival time and ensuring accurate correction.

12. AUX App (Audio and Video Input)

The A5L Android head unit supports external audio and/or video sources via RCA connectors. This function expands in-car entertainment by allowing users to connect third-party media devices—such as DVD players, portable music players, gaming consoles, or digital TV boxes—and play their content directly through the A5L system.

AUX input supports three possible connection scenarios:

1. Audio only (stereo sound via red/white RCA connectors)
2. Video only (composite video via yellow RCA connector)
3. Audio + Video (red, white, and yellow RCA connectors together for synchronized playback)

Note: The connector colors listed above may vary depending on the harness or production batch. Always confirm the labeling or refer to the product's wiring diagram to ensure correct connection.

Key Features

1. RCA-Compatible External Input:
   1. The AUX IN (Audio and Video) ports on the A5L Android head unit accept standard RCA analog signals (composite video and stereo audio).
   2. These ports support connections with external devices using yellow (video input), red (right channel audio input), and white (left channel audio input) RCA connectors, providing a simple and flexible way to expand in-vehicle media options independent of USB or HDMI inputs.
2. AUX App Integration:
   1. External audio and video input can be accessed through the pre-installed AUX app on the A5L system.
   2. By launching the AUX app, users can display video on the A5L screen, and audio is played through the car's original speakers.
3. Supports Multiple Formats Playback:
   1. Audio input uses stereo analog signals (left and right channels) when an external device outputs only sound or combined sound with video.
   2. Video input conforms to the composite video (CVBS) standard when an external device outputs video (with or without audio).
   3. When both audio and video are connected, audio is played through the vehicle's original sound system, while video is displayed on the A5L Android head unit's screen.

Prerequisites for AUX IN (Audio and Video) Connection: Before connecting to the AUX IN (Audio and Video) ports, please ensure that the external device supports RCA Output and is equipped with corresponding connectors:

1. Left channel audio output (white RCA)
2. Right channel audio output (red RCA)
3. Video output (yellow RCA, optional if video is required)

Note: The actual arrangement of the AUX IN ports may vary depending on the Android head unit model or the structure of the included RCA input wiring harness. Please refer to the specific wiring documentation (detailed Installation Instructions) for details.

Operation Steps

1. Confirm the Output Interface of the External Device: Ensure that the external device you intend to connect is equipped with standard RCA output ports.
2. Connect the External Device to the A5L: Connect the RCA output ports of the external device to the RCA input ports on the A5L's input wiring harness, matching both audio and video signals accordingly.
   • Audio only: Connect red and white RCA cables.
   • Video only: Connect yellow RCA cable.
   • Audio + Video: Connect red, white, and yellow RCA cables together.
3. Launch the AUX App: Navigate to Home Screen > APP Drawer > AUX App. Tap the AUX App icon to open the video playback interface. The system will automatically detect and play the incoming external signal.
4. Adjust Volume (if audio is present): Tap the volume icon of the A5L Android head unit's home screen. The volume control slider will appear—simply drag the slider to adjust the sound level.

Notes:

1. Driving Safety:
   • The AUX app's video playback feature is restricted when the vehicle is in motion, unless the user disables the "video playback while in motion" option in the system settings.
   • This restriction is designed to reduce driver distraction and help ensure compliance with road safety regulations.
   • By default, video playback is only available when the vehicle is stationary. Audio-only playback is not affected by this restriction and remains available while driving.
2. Disabling the Safety Restriction (not recommended for drivers):
   • Navigate to Home Screen > App Drawer > Settings > Car Setting > General.
   • Tap the switch for Disable video playback while in motion to enable or disable the feature.
3. Device Compatibility:
   • Some external devices may output video without audio, or audio without video. AUXIN will display/play whichever signals are provided.
   • For best results, use shielded RCA cables to minimize signal noise.

13. DAB+ App

The DAB+ app is pre-installed on A5L Android head units; however, the app alone does not enable DAB+ functionality. A compatible external USB DAB+ receiver (DAB+ Box, sold separately) must be connected to the head unit in order to receive DAB/DAB+ digital radio signals.

Key Features

1. Digital Audio Broadcast Reception: Receives DAB/DAB+ signals for stable, high-quality digital audio playback.
2. Full-Band Auto Scan: Automatically scans all available DAB stations in the region, building the channel list and updating newly added stations.
3. Grouped Browsing: Stations are grouped by service type (e.g., News, Pop Music, Sports) for easier browsing.
4. Signal Strength Display: Shows the signal strength of the current station to help find the best reception area.
5. Program Information Display: Displays station logo, signal strength, station name, Ensemble, frequency, and PTY (Program Type), depending on broadcaster data.
6. DLS Scrolling Information: Real-time text info (current program, song title, news snippets) scrolls across the screen.
7. Preset Favorites Function: Save favorite stations to a preset list for quick access.

Required Accessory

• A compatible DAB+ USB receiver is required.
• Use the ATOTO AC-4475 USB DAB+ receiver (DAB+ Box) (sold separately).

Note: The A5L is not compatible with third-party DAB+ receivers.

Operation Steps

1. Connect the DAB+ Receiver (DAB+ Box): Plug the ATOTO AC-4475 USB DAB+ receiver into any USB port on the A5L. Scan the QR code below and select the product model to view detailed instructions.
2. Launch the DAB+ App: Navigate to Home Screen > App Drawer > DAB+ App. Tap the app icon to launch the application.
3. Full-Band Background Scanning: The system automatically scans all digital radio frequencies in the region (covering multiple Ensembles). Found channels are saved to the channel list. Note: Scanning may take several minutes.
4. Browse and Listen: Tap the "<" icon to expand the channel list. Browse and tap any station to play. Features include station switching, favoriting, and viewing signal strength.
5. Playback Controls:
   • Play/Pause: Tap the Play or Pause button.
   • Switch Stations: Tap Previous or Next.
   • Favorite/Unfavorite Station: Tap the heart icon.
   • Expand Ensemble List: Tap the "^" icon to view all stations in a broadcast service group.

Important Notes:

• Ensure the head unit is connected to a compatible DAB+ Box before using the DAB+ app.
• DAB+ service is only available in Europe, Australia, and the UK. Verify local availability before use.
• If no stations are received, try moving the vehicle or relocating the DAB+ Box to improve signal reception.

14. Local Media Playback

The A5L Android head unit supports local media playback from external storage devices. Users can conveniently browse and play audio, video, photo, and document files stored on USB flash drives and—on supported models—Micro SD cards. This feature allows direct access to media content, expanding in-car entertainment and information options.

Notes: Not all models include a Micro SD card slot. Please check your unit's hardware design. If no Micro SD slot is available, use a USB flash drive instead.

Operation Steps

• Navigation Path: Home Screen > App Drawer > FileManager APP
• Step 1: Insert the USB Flash Drive: Insert the USB flash drive into the USB port of the A5L Android head unit.
• Step 2: Launch the File Explorer App: Tap the Files App icon to open the corresponding interface, and the interface will display a list of available storage sources, such as:
  • Internal Storage
  • USB Storage
  • Micro SD Card (only on supported models)
• Step 3: Browse Storage Devices: From the opened interface, tap the (USB flash drive icon) to open and view its directory. Folders and files appear in standard list or grid view.
• Step 4: View or Play Files: Select a file type (document, photo, audio, video) to view or play directly on the head unit.
• Step 5: Disconnect USB Safely: Before physically removing the USB device:
  • Pause or stop playback.
  • Exit to the Home screen or File Manager.
  • Ensure the device is not being accessed to prevent file corruption.

Notes:

1. Certain high-bitrate or professional video codecs may not be supported.
2. Watching video or photos while driving is against Federal, State, and Local laws.
3. Do not use features of this A5L Android head unit if it cannot be operated safely and legally in your location.
4. Video and photo playback is available only when the vehicle is stationary with the parking brake engaged.

15. ImageScan App (Picture Player App)

The ImageScan App is a pre-installed image viewing tool in the A5L Android head unit, allowing users to view image files from USB drives, SD cards, or local storage. Users can browse photos on the A5L Android head unit in either single-image or slideshow mode. This feature is suitable for reviewing photos taken during a trip or viewing saved image files. With touch control support, the browsing experience is intuitive and convenient.

Key features

1. Supports multiple image formats (JPG/PNG/BMP, etc.)
2. Automatically scans and reads image files from external devices
3. Provides folder browsing and categorized display.
4. Offers both single-image viewing and slideshow playback modes
5. Supports zooming in, zooming out, and rotating images
6. Allows folder-based file browsing and sequential switching

Operation Steps

1. Insert a Storage Device: Insert a USB flash drive or MicroSD card containing image files into the corresponding port of the A5L Android head unit. The system will automatically detect and read the image files.
2. Enable the ImageScan App: Navigate to the Home Screen > App Drawer > ImageScan. Tap to launch the ImageScan App to open the corresponding interface.
3. Select a Picture File to Play: In the interface, select the corresponding storage device. Browse folders and tap any image file to open and play the image.
4. Photo Icon: Tap to set the current photo as the desktop wallpaper.
5. Play/Pause: Start slideshow playback.
6. Rotate: Tap to rotate the photo 90° clockwise.
7. Delete: Tap to delete the current image.

16. Music Player App

The Music Player App is a pre-installed local music playback application in the A5L Android head unit. It supports playing music files from USB drives, MicroSD cards, or local storage. It supports a wide range of audio formats and flexible playback controls, enhancing the in-car entertainment experience.

Key features

1. Supports multiple audio formats (e.g., MP3, WMA, FLAC, APE, WAV)
2. Automatically scans music files from external storage devices
3. Provides folder browsing and categorized display.
4. Supports playback modes such as sequential, shuffle, and single-track loop
5. Supports lyrics display and album cover art (depending on file metadata)
6. Supports background playback and steering wheel control (if configured)

Operation Steps

1. Insert a Storage Device: Insert a USB drive or MicroSD card containing audio files into the corresponding port of the A5L Android head unit system. The system will automatically scan and detect the music files.
2. Launch the Music Player: Navigate to the Home Screen > App Drawer > Music Player App. Tap to launch the Music Player App and open the corresponding interface.
3. Select a Playback Source and Music File to Play: In the interface, select the corresponding storage device (e.g., “USB2,” “MicroSD,” “Internal Storage"). Browse folders or categorized lists and tap any song to start playback.
4. Playback Controls: In the music playback interface, tap the screen to display playback controls.
   • Song Info: Displays song title, album details, and artist name.
   • Progress Bar: Drag to adjust the playback position.
   • Playback Mode: Tap to switch between sequential, shuffle, or single-track loop modes.
   • Previous/Next: Tap to switch to the previous or next track.
   • Play/Pause: Tap to start or pause playback.
   • Playlist: Open the playlist to view and select songs.
   • DSP: Tap the DSP to optimize in-car audio based on your music, cabin environment, and personal preferences.

17. Video Player App

The Video Player App is a pre-installed local video playback application in the A5L Android head unit. It supports playing video files from USB drives, MicroSD cards, or local storage. Optimized for the A5L Android head unit's large display screen and touch operation, it supports multiple video formats and high-definition playback, meeting in-car entertainment needs while parked or resting.

Key features

1. Supports multiple video formats: MP4, AVI, MKV, MPG, 3GP, FLV, etc.
2. Automatically scans and detects video files on external devices.
3. Provides folder browsing and categorized display.
4. Offers playback-mode switching: single-video loop / play-all videos.
5. Allows full-screen / windowed playback mode switching.
6. Remembers playback position (resume from last point).
7. Includes basic controls such as fast-forward/rewind, pause/play, and progress slider.

Operation Steps

1. Insert a Storage Device: Insert a USB drive or MicroSD card containing video files into the head unit; the system will automatically detect and load the media content.
2. Launch the Video Player: Navigate to Home Screen > App Drawer > Video Player App. Tap to launch the Video Player App and open the corresponding interface.
3. Select Source and Video File to Play: In the interface, choose the desired storage location (e.g., "USB2,” “MicroSD," or "Internal Storage"), browse the folders, and tap any video file to start playback.
4. Playback Controls: In the video playback interface, tap the screen to display playback controls.
   • Playback Mode: Tap to switch between different playback modes, including:
   • Sequential: Plays videos in the order they appear in the playlist.
   • Shuffle/Random: Plays videos in a random order.
   • Repeat One: Continuously repeats the current video.
   • Windowed/Full-Screen Mode: Tap to toggle between windowed and full-screen playback.
   • Previous: Tap to switch to the previous video.
   • Play/Pause: Tap to start or pause playback.
   • Next: Tap to switch to the next video.
   • Playlist: Open the playlist to view and select videos.
   • Video Info: Displays the current video's title and related details.

18. File Manager App

The file manager application function enables efficient management of files stored locally and on external storage devices, serving a similar purpose to file managers on smartphones or computers. This feature provides users with an intuitive and convenient interface, allowing easy browsing, categorization, copying, and deletion of files in the A5L Android head unit's internal storage, external USB drives, Micro SD cards, and other devices, thereby meeting file management needs in driving scenarios.

Operation Steps

• Navigation Path: Home Screen > App Drawer > FileManager APP
• (1) Specific steps to manage local files using the File App
  1. Tap to open the FileManager App on the home screen to access the File Manager interface.
  2. In this interface, you can browse, categorize, copy, and delete files.
• (2) Specific operation steps for managing files on external storage devices:

  Note: Use a USB flash drive as an example; steps for other external storage devices are similar.

  1. Insert the USB flash drive (sold separately) into the USB port of the A5L Android head unit.
  2. Tap the File app icon on the main screen to open the File app interface.
  3. In the File app interface, tap the USB flash drive icon to access its contents.
  4. In the opened interface, you can browse, categorize, copy, and delete files as needed.
  5. After finishing your operations, you can safely remove the external USB flash drive, and then unplug the USB drive. Make sure no files are being read or written.

  Note: Using a USB flash drive as an example; the steps are similar for other external storage devices.

• (3) Specific operation steps for copying pictures or other types of files from a USB Storage Device to A5L Android head unit
  1. Insert the USB flash drive into the USB port of the A5L Android head unit.
  2. Tap to open the Files App on the home screen interface to open the file app interface.
  3. In the file app interface, tap the USB drive icon (USB3) to open the corresponding interface.
  4. In the opened interface, locate the image you want to copy, long-press the image, and tap the copy icon in the upper right corner.
  5. Open the folder where you want to store the images. Tap the "Copy" button to complete the copying process.
  6. After the operation is complete, tap the folder to view the copied images.

  Note: The same steps apply for copying files from the A5L Android head unit to the USB drive; you just need to switch the selection order between the A5L Android head unit and the USB drive.

19. Split Screen

The Split Screen allows users to run and display two applications simultaneously on the same screen, enabling multitasking. For example, users can use navigation while playing music or browsing the web, without frequently switching between apps, thereby improving operational efficiency and driving convenience. The main features are as follows:

1. Supports simultaneous display of two apps on one screen without interference
2. Provides quick methods to switch or exit split-screen mode
3. Compatible with some native and third-party apps (depending on whether the app itself supports split screen)

Note: This feature is available on Android car systems that support split-screen mode and must be used with apps that are compatible with split-screen display.

Operation Steps

1. Tap the square to enter into background apps.
2. Find the desired app and then drag it to the left, and choose another it run on the right window.
3. Scroll left or right to a single-window display.

Important Notes:

• Exit Split-Screen: Drag the divider in the middle of the two apps and enlarge one app; the other app will exit split-screen.
• App Support: Not all apps support split-screen. Only apps displaying the split-screen icon can be used.

20. Camera Input

The A5L Android head unit supports camera inputs, mainly including Rear View (Rear View Camera) and DVR (USB Dash Cam). These features enhance driving safety and provide convenience when properly configured.

1. Rear View (Rear View Camera): Provides a rear view to facilitate reversing and parking assistance.
2. DVR CAM (USB Dash Cam): Provides basic front-road recording and real-time video display through the pre-installed DVR app.

Notes:

1. The A5L comes with pre-installed Rear View and DVR CAM apps, the functions will only activate when the corresponding cameras are connected.
2. To activate camera input features, users can purchase and connect the official ATOTO camera accessories.
3. The head unit may not be compatible with third-party cameras. For best results, consult ATOTO Customer Service or a professional installer before purchase and installation.
4. DVR recording is handled by the external AC-44P2, not by the A5L head unit's SoC. Therefore, AI Vision features available on other ATOTO platforms are not supported on A5L.

20.1. Rear View Camera

The Rear View function displays real-time views of the road behind the vehicle, eliminating rear blind spots to enhance safety and convenience during parking and reversing maneuvers.

Compatibility:

1. The ATOTO AC-HD02LR Rear Recording Camera (Sold Separately). Please refer to the packing list for its availability.
2. Both aftermarket and factory rear-view cameras with a standard RCA plug, CVBS video signal output, and a dedicated reversing signal wire. If incompatible, a wiring or video signal converter is needed for installation.

Operation Steps

1. Check Camera Details: Refer to the separate ATOTO AC-HD01LR User Manual on the Eproductcare website. Detailed instructions are provided on installation, wiring, and operation of this camera. (Navigation Path: Navigate to Eproductcare > More > On-Dash Cameras > AC-HD02LR)
2. Connect the camera's power wires to the backup lights.
3. Connect its RCA cable to the car stereo's RCIN port.
4. Attach the camera's signal wire to the car stereo's on the power harness.
5. Preview the Rear View: Navigation Path: Navigate to Home Screen > App Drawer > RCAM App. Tap the Rear View App icon to preview the real-time rear view of the vehicle from the connected AC-HD02LR on the A5L Android head unit's screen.

20.2. DVR CAM

The DVR CAM function works with a USB driving recorder to improve driving safety, capture accident evidence, and record trips.

Required Accessory

1. ATOTO USB Dash Cam AC-44P2 (Sold Separately).
2. Connects via the head unit's USB port. Requires a microSD/TF card (not included) for recording storage. Insert a Micro SD card correctly for operation.

App Installation:

1. Preinstalled Apps: Most of our Android car stereos come with the DVR CAM app already installed.
2. Installing or Upgrading to DVR CAM App: If your Android car stereo purchased from our company lacks the DVR CAM app or only has the outdated HD DVR version, follow these steps to ensure you're using the latest DVR CAM app, enhancing compatibility with the AC-44P2's new chip and preventing lag issues:
   • Step 1. Uninstall HD DVR: If the HD DVR app is installed, remove it from your device.
   • Step 2. Manual Installation:
     • Method 1: Insert the AC-44P2 to the car stereo, and the DVR CAM app will appear in this route: "File Manager>USB>YF_SA_baseRelease_xxxx.apk". Then tap the apk to install it.
     • Method 2: Download "DVR CAM" app from our app store "FindApps" directly.

Note: If the dash cam fails to display the screen during the initial setup, please select "Restart" from the drop-down menu. It may take a few minutes for the USB device to be recognized in the file manager. The DVR CAM app is exclusively designed for the AC-44P2 DVR Camera and is compatible with certain Android car stereo brands.

Operation Steps

1. Understanding the AC-44P2 DVR Details: Refer to the separate AC-44P2 User Manual on the Eproductcare website for further details. Detailed instructions are provided on installation, wiring, and operation of this camera. (Navigation Path: Navigate to Eproductcare > More > Backup Camera > AC-44P2)
2. Connect the ATOTO USB Dash Cam to the designated USB port. Navigation Path: Home Screen > App Drawer > DVR App
3. Tap to start recording and view live video.

Important Notes:

1. Safety Warning:
   • Rear-view camera is recommended for safe reversing.
   • Video preview (RCAM/DVR) should not distract drivers during motion.
   • Use these features responsibly and comply with local driving laws.
2. Always refer to the specific camera's User Manual on the official Eproductcare website for wiring and installation details.

21. TrackHU App (Built-in GPS Vehicle Tracking)

TrackHU is designed to simplify the way you locate your car. It enables real-time tracking on a map, setting alerts and geofences, accessing analytics and historical data about speed and distance, providing 24/7 vehicle security. Activate it by enabling GPS and network on the car stereo and scanning the car stereo's QR code to access the TrackHU Manager for comprehensive tracking information. TrackHU App is primarily responsible for locating the vehicle and reporting its location, with two core functions as follows:

1. Positioning: Utilizes the built-in GPS module of the vehicle system to obtain real-time geographic location information of the vehicle.
2. Reporting: Sends the acquired location information to a designated remote server via the Android head unit's mobile network (such as 4G) or Wi-Fi.

Note: The TrackHU app on the A5L does not support advanced features (geofence setup, alarm rule configuration, or tracking strategy management). It acts only as a data collection and upload tool.

21.1. Extended Features via TrackHU Manager (Mobile/Web)

To unlock full functionality, log into the TrackHU Manager Web Portal on your mobile phone:

1. Real-time Tracking: View your vehicle's live location with dynamic map display.
2. Driving Data Access: Review historical driving data including speed and distance analytics.
3. Geo-Fencing: Create virtual boundaries and receive alerts when your vehicle enters or exits the defined zone.
4. Alarm Notifications: Get instant alerts on your phone or head unit for abnormal events (e.g., vibration, movement).
5. 24/7 Vehicle Security: Continuous monitoring and alerts to help safeguard your vehicle.

21.2. How to add the car stereo as a device to be tracked in the TrackHU?

Operation Steps

1. Step 1: Have the car stereo access the internet. And make sure the location of the car stereo is enabled following the path "Car Settings>> General".
2. Step 2: Tap "General" 10 times in quick succession. A prompt will appear on the interface, indicating that the TrackHU APP logo is visible in the app list. No prompt means system update is needed. Note: The TrackHU APP icon is hidden by default to protect users' privacy. You can tap "General" 10 times in quick succession again to make the APP invisible.
3. Step 3: Enter TrackHU APP. Tap the button to enable TrackHU. You will see the network and GPS status at the left corner and give us some suggestions by tapping 3.
4. Step 4: Scan the QR code to enter the TrackHU Manager website on the phone. The QR code will be expired in 5 minutes and you can refresh the QR code by tapping the button or exiting the TrackHU and entering again.
5. Step 5: Register with your email address on the TrackHU Manager website and log in.
6. Step 6: You can give a name to the car stereo and after that tap the map button and then to view the named device. When you see the named device is in the "online" status in seconds, tap the device name to see the car stereo's location, past route, and more information.

Note:

1. Ensure your car stereo's both GPS and network are enabled to receive notifications via email and to access tracking data in the TrackHU Manager APP or website.
2. If your car stereo loses internet connectivity, the tracking data will be stored locally and automatically uploaded to the server once the connection is restored.
3. TrackHU is in beta and subject to updates. Always refer to the car stereo and mobile interface for the latest instructions.
4. The default tracking refresh rate is 45 seconds. Shorter refresh intervals are available through paid subscription options in the SSHub app.

22. LumiAuto App (Ambient Lighting Control)

The LumiAuto App allows you to control the ATOTO CI-FLT01 Interior Footwell Lights (sold separately) for personalized in-car ambient lighting. You can manage lighting effects either from the A5L Android head unit (pre-installed LumiAuto app) or your smartphone (download required).

22.1. Key Features

Lighting Modes

• Solid Color Mode: Choose any color from the full RGB spectrum.
• Multi-Color Mode: Access dynamic effects such as breathing, gradient, or strobe.

Customization & Synchronization

• Adjustable Brightness: Independently set the front and rear brightness levels
• Music Sync: Lights pulse & shift with your music (Bluetooth or local playback)
• Scene-Based Ambience: Save and apply presets for different occasions (e.g., relaxed evening, road trip).

Control Options

• Via Head Unit: Open the LumiAuto app from the A5L screen and adjust settings.
• Via Smartphone: Download the LumiAuto app to make remote adjustments & manage saved profiles.

22.2. Functionality Overview

The LumiAuto app lets you adjust color, brightness, and lighting modes of the CI-FLT01 lights, enhancing your in-car ambiance to match your preferences.

22.3. Requirements

• Accessory: ATOTO CI-FLT01 Interior Footwell Lights (sold separately).
• Software:
  • A5L Head Unit: Pre-installed LumiAuto app.
  • Smartphone: Download the LumiAuto app (Currently optimized for Android; iOS version coming soon.)

22.4. Setup & Usage

For installation and detailed instructions, scan the provided QR code and select CI-FLT01 model. (Navigation Path: Navigate to Eproductcare > More > Footwell Light Kits > CI-FLT01).

23. TPMS (Tire Pressure Monitoring System) App

The TPMS continuously monitors tire pressure and temperature in real-time. When abnormalities are detected (e.g., overinflation, underinflation, or abnormal temperature rise), the system immediately alerts the driver to enhance driving safety and prevent hazardous incidents such as tire blowouts.

1. Required Accessory: To use the TPMS App, the ATOTO AC-UTP1 TPMS (sold separately) is required. (Note: The A5L is not compatible with third-party accessories.)

2. Software: The A5L includes a pre-installed TPMS application, which continuously monitors tire pressure and temperature in real-time when paired with the ATOTO AC-UTP1 TPMS (sold separately).

3. Setup & Usage: For installation and detailed usage instructions, scan the QR code below and select AC-UTP1 model.

24. Torque App

The Torque App is a third-party automotive diagnostic application designed for the Android platform, specifically used with OBD II Bluetooth diagnostic interface devices. By installing the Torque app on the A5L Android head unit, users can access real-time data from the vehicle's ECU (Engine Control Unit) to monitor vehicle status, perform fault diagnostics, and analyze performance.

Torque App's Functionality: The Torque App allows you to check engine operating conditions, clear fault codes, view real-time sensor data and more when paired with the ATOTO AC-4450 (sold separately).

1. Requirements

• Accessory: ATOTO AC-4450 Mini OBD II Diagnostic Scanner (sold separately).
• Software: The A5L head unit includes a pre-installed Torque app, which works once paired with the AC-4450 scanner.

2. Functionality Overview

• Monitor engine operating conditions in real-time.
• View live sensor data and system performance.
• Perform fault diagnostics and clear fault codes.
• Analyze vehicle performance trends.

3. Setup & Usage: For installation and detailed instructions, scan the QR code below and select AC-4450 model.

25. CarloTHub App

CarloTHub is an in-head-unit IoT control platform designed to centrally manage ATOTO-compatible in-vehicle smart accessories. It allows you to connect and control supported devices—such as ambient lighting kits, Premium Bluetooth LED message sign, and OBD accessories—from one place for unified operation.

With the CarloTHub App, you will be able to:

• Connect and control compatible in-vehicle accessories (such as LED message signs, ambient lights, and OBD devices), including power on/off and mode adjustments.
• Serve as an IoT control center to manage multiple smart accessories in one place, with a unified viewing and control interface on the head unit's large screen.
• Work with the DriveChat agent to enable voice control for supported accessory functions, improving convenience and reducing manual operations.
• Provide seamless integration for ATOTO head unit and accessory users, helping ensure compatible accessories work smoothly with the car stereo.

25.1. Smart LED Lighting (Model: AL-4IN6-18W)

Smart LED Lighting is a Bluetooth-enabled LED light kit from Leaprock, designed for 12 V vehicles. It provides bright wide-area illumination and supports convenient control features such as on/off switching, brightness/mode adjustment, and protection features for stable operation in demanding environments.

A5L Compatibility: The A5L head unit is compatible with this Smart LED Lighting because the light can be connected and controlled through the CarloTHub app, which is built into A5L. After pairing over Bluetooth, you can manage the light directly on the A5L screen, including basic controls such as power and mode/brightness adjustments. If DriveChat voice control is enabled on your A5L, you can also use voice commands to control supported lighting functions through CarloTHub.

Notes: If the connection fails, turn Bluetooth off and back on, then search for nearby devices and reconnect in CarloTHub.

25.2. Premium Bluetooth LED Message Sign (Model: INT21A)

The Premium Bluetooth LED Message Sign is a 21" USB-powered LED display from Leaprock, designed for flexible messaging in car and retail scenarios. It supports customizable text and effects, and can also display simple graphics such as pictures and GIFs through the control app—ideal for drivers, shops, and creators who want messages that are clear and attention-getting day or night.

A5L Compatibility: The A5L head unit is compatible with the INT21A because this LED sign is a CarloTHub-ecosystem accessory, and CarloTHub is built into A5L. After Bluetooth pairing, you can create, switch, and manage LED messages directly from the A5L screen through CarloTHub—reducing the need to use your phone while driving. If DriveChat is available on your A5L, you can also use voice input to adjust supported message functions via CarloTHub for more convenient operation.

Notes: If reconnection is needed, turn Bluetooth off and back on, then search nearby devices and reconnect in CarloTHub.

26. FindApps

FindApps is an exclusive app store designed specifically for ATOTO Android devices, providing a curated selection of apps that are fully compatible with ATOTO units. Unlike the general Google Play Store, FindApps ensures app reliability and seamless operation on your head unit.

Operation Steps

1. Launch FindApps: Navigate to Home Screen > App Drawer > FindApps. Tap the app icon to open it.
2. Install Apps: Browse the app list to find desired apps. Tap Install > Retrieve to download and install the app on your A5L head unit.
3. Manage Apps: Go to Manage page. Scroll through the installed apps list to:
   • Open an app
   • Uninstall an app
   • Update an app

   Perform the desired action to maintain your head unit's software.

Note: After installing applications from FindApps, you can later configure detailed settings (e.g., notification permissions, cache management, background activities) or uninstall them through the Apps Management (see more details in section 30.7).

27. Fast Boot

The Fast Boot function is designed to speed up the system's entry into the main interface after the vehicle is started, significantly reducing boot-up time.

27.1. How Fast Boot Works

1. Low-Power Sleep Mode:
   1. Activates approximately 5 minutes after the engine is turned off and the key is removed (or upon opening the driver's door, depending on the car).
   2. Enables the A5L Android head unit's system to wake up in under 2 seconds with the ACC power signal.
2. Battery Efficiency:
   1. Operates on less than 10mA, allowing a typical car battery to last between 160-250 days in this mode.
   2. Automatically transitions to full power-off mode if idle for more than 168 hours (7 days), reducing the battery drain to just 2.5%-4%.
3. Recharging and Automatic Shutdown:
   1. Daily driving recharges the battery, preventing the system from an automatic shutdown.
   2. After parking for over 7 days, system start-up will take 20-25 seconds.
4. Proven Reliability: Supported by over 100,000 users.

27.2. Cautions for Fast Boot

1. To ensure Fast Boot functions correctly, it's crucial to wire the "12v Ignition/ACC" and "12v Constant Power/Battery” correctly in the power harness. For details, please refer to the "Connection” section under “Installation". (Navigation Path: Navigate to Eproductcare > Car Stereo > A5L > Specific Model: A5LXXX > Installation)
2. Incorrect wiring may prevent the system from entering sleep mode, leaving the screen on, or interrupting the hibernation process, leading to a 20-30-second restart time.

28. Network Settings

This chapter introduces the Network Settings of the head unit, including WLAN, Data Usage, Data Saver, and Hotspot & Tethering. Proper configuration helps you manage connections and optimize data usage.

28.1. WLAN (Wi-Fi) Settings

WLAN (Wi-Fi) provides wireless internet connectivity, enabling stable and high-speed access while reducing mobile data consumption. It also supports system updates and app downloads. The WLAN page displays a list of available Wi-Fi networks.

Benefits include:

1. High-Speed Internet Access: Connect to Wi-Fi networks at home, office, or public places.
2. Data Saving: Reduce mobile data usage (4G) and save costs.
3. Software Updates: Some system updates require Wi-Fi to prevent large mobile data consumption.

Notes:

• Supports 2.4GHz & 5GHz dual-band Wi-Fi (depending on hardware configuration).
• Supports WPA/WPA2/WPA3 security protocols for safe connections.

Operation Steps

1. Step 1: Navigate to Settings > Network Settings > WLAN (Wi-Fi).
2. Step 2: Turn on the WLAN switch and select the desired Wi-Fi network.
3. Step 3: Enter the password if required and confirm connection.

For specific steps on Wi-Fi network settings, please refer to section 5.1 in this manual.

28.2. Data Usage Settings

The Data Saver feature helps control background data usage and prevent unnecessary Wi-Fi data consumption. This applies to Wi-Fi data usage as displayed in the Data Usage page.

Operation Steps

1. Step1: Navigate to Settings > WLAN > Data Usage. View the total data usage displayed at the top of the page.
2. Step 2: Tap "View Details" to see per-app data consumption across different time periods.

28.3. Hotspot & Tethering Settings

The "Hotspot & Tethering" menu allows the head unit to generate a local Wi-Fi signal.

Note: Unlike a smartphone, this hotspot is not intended to share an internet connection with other devices. Instead, it creates a Local Area Network (LAN) required for specific interconnectivity features:

• Wireless Android Auto: The hotspot serves as the high-speed data link for wireless projection.
• Screen Mirroring/Casting: Enables functions that require the mobile phone and head unit to be connected to the same local network to transmit video or audio.

Operation Steps

1. Step 1: Navigate to Settings > Hotspot & Tethering
2. Step 2: Select Hotspot & Tethering.
3. Step 3: Enable Wi-Fi Hotspot.

29. Car Settings

Device Settings provide comprehensive management and customization options for the core functions of the Android car multimedia system, ensuring optimal performance and user experience in various driving scenarios. Within this chapter, users can flexibly adjust display effects, sound output, storage management, app control, and video output to better suit individual needs and enhance convenience while driving. It specifically includes the following:

1. General Settings: Customize radio region, driving aids, and system preferences.
2. Display Settings: Customize screen wallpaper and adjust screen auto-off time.
3. Sound Settings: Customize audio output and system sounds.
4. Storage Settings: View and manage storage and free up space.
5. Apps Settings: Manage installed applications, including permissions and running status.
6. USB Video Output Settings: Configure USB video output for external display support.

29.1. General Settings

This section provides access to fundamental system configurations. From selecting the correct radio frequency region to calibrating reversing camera guidelines and enabling driving safety protocols, these settings ensure the device operates correctly and complies with your local driving environment.

1. Select Your Radio Region: Ensure you choose the correct radio area to match your location for optimal station reception. If you reset the device, you'll need to reselect your area manually to ensure proper functionality.
2. Rear/AUX Mirror Setting: Adjust the display orientation and ensure images are correctly displayed according to your needs.
3. Turn the Shortcut Touch, Illumine Detect, watch video while drive, Dynamic reversing auxiliary line switch, Reverse Line, Autoplay Music on or off. Also, set your preferred navigation program, Delayed reversing time and Speed Correction.

29.1.1. Steering Wheel Control (SWC) Learning Configuration

The Steering Wheel Control (SWC) Learning function allows you to operate key functions of the A5L Android head unit—such as track switching, volume adjustment, call answering, and voice assistant activation—directly from your steering wheel buttons. This eliminates the need for touchscreen interaction, enhancing driving safety and convenience.

Compatibility Requirements

• Required Vehicle Feature: Your car must be equipped with factory steering wheel controls (SWC).
• Signal Type: The A5L directly supports resistive analog SWC signals.
• Digital CAN Bus Systems: Vehicles with digital CAN Bus SWC signals require a third-party CAN Bus to Resistive Analog adapter (sold separately) to retain SWC functionality.
• How to Check: Consult your vehicle's owner manual or contact the manufacturer to determine if your SWC system uses resistive analog or digital CAN Bus signals.

How to Map SWC Buttons

The A5L supports steering wheel control (SWC) button mapping, enabling direct control of the head unit from your steering wheel.

Operation Steps

1. Access SWC Learning Interface: Navigate to Settings > Car Setting > General > Enter SWC setting interface
2. Map Buttons:
   1. Press and hold a button on the steering wheel.
   2. Short press the desired function button icon on the SWC Learning interface (e.g., Volume Up). The icon color will change.
   3. Release the steering wheel button. Repeat for each function you want to program.
3. Save Settings: Tap Save and Exit button to store the configuration.

Warm Reminder: If your vehicle does not have factory SWC, you can use the AC-44F8 Wireless Steering Remote Control (sold separately) or AC-44F20 Smart Wireless Remote Controller (sold separately) to add steering wheel control functionality. Both work with the A5L Android head unit and most other Android head units.

AC-44F8 Wireless Steering Remote Control Functionality: The AC-44F8 provides steering wheel-style controls for vehicles without factory SWC.

Supported Functions:

1. Volume Control – Adjust audio volume or mute.
2. Playback Control – Play/pause music and switch tracks.
3. Call Control – Answer/Reject calls.
4. Voice Assistant - Activate DriveChat or Google Assistant.

Setup & Usage: Scan the QR code below and select AC-44F8 model to view detailed instructions.

AC-44F20 Smart Wireless Remote Controller Functionality: AC-44F20 is a newly released controller for vehicles without SWC or for users who prefer physical buttons over touchscreen control. It functions as an external control panel for the A5L.

Supported Functions:

1. Volume Control – Adjust audio volume.
2. Playback Control – Switch tracks or radio stations.
3. Call Control – Answer/Reject calls.
4. Voice Assistant - Activate DriveChat or Google Assistant.
5. Home Screen - Return to A5L home screen.
6. Screen Control – Wake or put the A5L screen to sleep.

Setup & Usage: Scan the QR code below and select AC-44F20 model to view detailed instructions.

29.2. Display Settings

The Display Settings allow users to customize the appearance and behavior of the car head unit screen, optimizing both visual experience and operational habits. It mainly includes:

1. Wallpaper Customization: Supports switching between static and dynamic wallpapers, allowing quick replacement with preferred images or animated backgrounds.
2. Screen Saver Settings: Allows setting the auto screen-off time when no operation is detected, helping save energy and extend screen lifespan.

29.2.1. Wallpaper Customization

The Wallpaper Customization feature allows users to personalize the visual appearance of the home screen by selecting from live or static wallpapers, or using personal images.

• Live Wallpapers: Supports selecting built-in dynamic wallpapers, providing a more vivid and animated screen effect.
• Static Wallpapers: The system comes pre-installed with multiple sets of high-resolution wallpapers, covering styles such as natural landscapes and abstract art. Users can switch to their preferred wallpaper with one tap in the system settings menu.

Operation Steps

• Navigation Path: Settings > Car Setting > Display > Wallpaper > Live Wallpapers / Wallpapers
• Step 1: Tap Wallpaper.
• Step 2: Select Live Wallpapers or Wallpapers.
• Step 3: Browse and choose the desired wallpaper (system-provided or from gallery).

29.2.2. Automatic Screen Off Settings

The Auto screen off feature allows users to set the duration of inactivity after which the screen will automatically turn off, reducing power consumption and preventing unnecessary distraction while driving.

Operation Steps

• Navigation Path: Settings > Car Setting > Display > ScreenSaver
• Step 1: Enter the ScreenSaver option
• Step 2: Select the preferred time from the list: Never/30 seconds/1 minute/2 minutes/5 minutes/10 minutes/30 minutes

29.3. Sound Settings

The Sound Settings allow users to manage audio output and sound effects, helping optimize the listening experience according to personal preference and driving environment. From top to bottom, the page mainly includes:

1. Media volume when navi: Controls music level while navigation is speaking.
2. Media volume when reversing: Sets audio level when the car is backing up.
3. Navi Gain: Adjusts navigation voice volume relative to the music.
4. Bluetooth Volume: Sets the base volume for Bluetooth audio and calls.
5. Ring Volume: Sets the loudness of the incoming call ringtone.
6. Default Volume: Sets the fixed volume level every time the unit turns on.

29.4. Factory Settings

The Factory menu is an advanced configuration interface designed for system installation, hardware adaptation, and deep customization. It allows users to match the head unit with the specific vehicle model, configure external devices, and adjust core system behaviors.

Operation steps:

1. Navigation Path: Settings > Car Setting > Factory
2. Select Factory Settings
3. When prompted for a password, enter 3368 and confirm to enter the interface.

Key Features & Functions: Based on the system interface, the available settings include:

Vehicle Protocol & Control:

• CarType Setting / CAN Related Settings: Configures the specific vehicle protocol box to ensure steering wheel controls and car data work correctly.
• Control Learning: Includes Touch Learning (calibrating screen buttons), Physical Learning (panel buttons), and Remote Control Learning.

Display & Customization:

• Startup Customization: Use Dedicated logo settings to change the boot logo and regain the default boot animation to reset startup visuals.
• Screen Configuration: Use Screen adjustment for calibration and PWM regulation to adjust backlight brightness logic.
• Interface Options: Includes Split Screen mode, Status bar panel mode, and The navigation bar slides out sideways.
• Information Display: Toggle Real-time network speed, Power supply voltage value display, or change the Speed Unit (km/h vs mph).

Hardware & Connectivity:

• USB & Ports: Configure USB switching (e.g., Rear USB settings) and USB Setting.
• Audio & Radio: Adjust Audio AMP (Amplifier output), Radio ANT (Antenna power), and RDS settings.
• Bluetooth: Configure BT Pairing Mode and BT Sync Volume Mode.

Video & Camera:

• Camera Settings: Toggle Front Switch (for front cameras) and CCD enhancement for image quality.
• Reversing: Configure Reverse detection and Reverse Video Signal Reminder.
• Output: Manage AV OUT and AV Output Range.

Power & Standby:

• Standby Logic: Use Standby Options (e.g., "Cold start after 7 days") and Acc Delay to manage how the unit sleeps or shuts down when the car is turned off.
• Startup Tasks: Configure Startup application or Startup Navigation to auto-launch apps upon booting.

Note: These settings control the core hardware parameters. Incorrect changes may cause features (like reversing cameras or steering wheel controls) to stop working. Please modify only when necessary.

30. Device Settings

The Users & Accounts menu on the A5L Android head unit allows you to manage system accounts, configure security and location services, select language input, access Google services, and reset the system. These functions enhance personalization, security, and system control. Key functions are including:

1. Configure Location Services
2. Configure Security Settings
3. Select Language & Input
4. Configure Google Services
5. Reset System
6. Manage Accounts

30.1. Location Services

The Location settings manage whether the head unit and installed apps can access device location information. With this menu, users can enable/disable location globally, control app-specific permissions, and fine-tune advanced features such as scanning and accuracy. In this menu, you can view the following options:

1. Use Location: Master switch to enable/disable location services system-wide. Disabling blocks all apps from accessing location.
2. Recent Location Requests: Shows which apps recently requested location access.
3. App Permission: Displays how many apps have access and lets you manage individual app permissions.
4. Wi-Fi and Bluetooth scanning: Improves location accuracy by scanning nearby Wi-Fi access points and Bluetooth devices, even when Wi-Fi/Bluetooth toggles are off.
5. Advanced: Includes Earthquake alerts, Emergency Location Service, Google Location Service, Location Sharing, Location Accuracy, and Trusted places.

Operation Steps

• Navigation path: Navigate to Settings > Location > Privacy
• Step 1: Toggle Use Location On to enable location services.
• Step 2: Tap App Permission to allow or deny location access per app.
• Step 3: Tap Wi-Fi and Bluetooth scanning to enable/disable scanning-based accuracy.
• Step 4: Open Advanced to configure emergency services, sharing, or accuracy options.

Notes:

1. Disabling location will prevent navigation and location-based apps from functioning properly.
2. Enabling Wi-Fi/Bluetooth scanning improves accuracy but may slightly increase power consumption.
3. High-accuracy location may share anonymous wireless signal data with Google; review privacy preferences before enabling.

30.1.1. Security Settings

The Security settings help safeguard the system and user data against malicious apps, unauthorized access, and potential online threats. This screen shows the system's current security status and provides tools to enhance protection, ensuring safe use of the head unit while driving as detailed below:

1. Google Play Protect: Google's built-in app scanning service, regularly checks installed apps for potential risks.
2. Find Device: Allows remote locating, locking, or wiping the device if linked with a Google account.
3. Android Safe Browsing: Provides alerts about dangerous websites to improve online safety.

30.2. Google Settings

The Google Services feature allows you to manage Google-related functions and control data synchronization and privacy permissions. This includes services such as Google Play Store, Google Maps, and Voice Assistant.

Operation Steps

1. Step 1: Navigate to Settings > Google
2. Step 2: Manage the available Google services according to your preferences.
3. Step 3: Adjust synchronization settings and privacy permissions as needed.

30.3. Manage Accounts

The Manage Accounts feature allows you to add, sync, and manage accounts on your A5L Android head unit. You can sync a Google account or register and log in with an ATOTO account. This feature also supports automatic synchronization of app data for each account.

Operation Steps

1. Step 1: Navigate to Settings > Accounts
2. Step 2: Log in to your account
   1. Log in with a Google account (If you do not have a Google account, please register one)
   2. Log in with an ATOTO account (If you do not have an ATOTO account, please register one)

30.4. Accessibility Settings

The Accessibility Settings feature allows you to set Basic Display, Extra dim, Magnification, and Captions, as detailed below:

1. Display: Supports setting Display size and text, Color and motion.
2. Extra dim: Tap to enable/disable "Extra dim." Tap to enable "Extra dim" to dim the screen beyond your device's minimum brightness.
3. Magnification: Tap to enable/disable "Magnification Shortcut."
4. Captions: Supports setting Live Caption, Caption Preferences.

Operation Steps

• Navigation Path: Navigate to Settings > Accessibility

30.5. Storage Management

The Storage Management is used to view and manage the internal storage space usage, including system occupation, application data, media files, downloads, and cache data, as well as removing infrequently used applications. Through this feature, users can clean up redundant files and free up space, ensuring smooth and stable system operation.

Operation Steps

• Navigation Path: Navigate to Settings > Storage
• Step 1: Enable Storage Manager: Tap the "Storage Manager” switch to enable this feature.
• Step 2: Enable FREE UP SPACE: Tap "Free up space” to enter the corresponding interface. Select the files you wish to delete, then tap "Free up” to remove them and reclaim storage space.
• Step 5: Remove Infrequently Used Apps: From the "Free up space” interface, tap the "More Options" icon (three dots) in the upper-right corner and tap "Show all items" to open the corresponding interface. Then choose infrequently used apps and tap "Free up” to uninstall them and release memory.

30.6. APPs Management

The Apps Management function allows users to view and manage applications that are already installed on the A5L Android head unit. From this menu, users can monitor memory usage, manage storage, and configure detailed settings such as notification permissions, cache, and background activities.

You can use FindApps (Chapter 24) to discover and install new compatible apps. Here in the Apps Management menu, you can configure, maintain, or remove those apps after installation. Together, they form a complete cycle for managing the software environment of your A5L head unit.

Operation Steps

1. Step 1: Navigate to Settings > Apps & notifications.
2. Step 2: Browse the application list to check memory and storage usage.
3. Step 3: Tap an app to open its details page, where users can:
   • Manage notification permissions
   • Clear app cache
   • Force stop or uninstall the app
4. Step 4 (Integration with FindApps): If you need to add new apps, open FindApps from the App Drawer (see more details in Chapter 24). After installation, return to Apps Management to configure or uninstall as needed.

31. System Settings

This chapter provides an overview of the essential system configurations for your device. In this section, you will learn how to customize regional preferences including Language & Input methods and Date and Time synchronization. It also covers maintenance options such as performing a system Reset and accessing the About Device menu to view software versions and hardware specifications.

31.1. Language & Input

The Language & Input settings allow you to manage system display languages, input methods, and advanced typing features. With this menu, you can:

• Switch the system UI language for multilingual use;
• Manage virtual keyboards and voice typing;
• Configure physical keyboard connections;
• Adjust advanced options such as pointer speed and text-to-speech output feedback.

31.1.1. Language Settings

The language settings feature allows users to set the system language and app language. The system provides multiple languages, including English, German, Japanese, and others that can be set as the system language.

Operation Steps

1. Step 1: Navigate to Settings > System > Language & Input.
2. Step 2: Tap Languages to open the list of available languages.
3. Step 3: Select your preferred language: Press and drag your preferred language to the top of the list, or simply tap it to set it as the system language.
4. Step 4: To add or remove languages:
   • Tap + Add a language to add a new language.
   • Tap the More Options icon (three dots at the top-right) to remove one or more languages from the list.

31.1.2. Input Settings

The Input Settings feature allows you to configure the virtual keyboard and connect a physical keyboard.

Operation Steps

1. Step 1: Navigate to Settings > System > Language & Input.
2. Step 2: Tap Virtual keyboard to configure keyboard settings.
3. Step 3: Follow on-screen instructions to select input methods or connect a physical keyboard.
4. Step 4: Adjust advanced options such as pointer speed and text-to-speech output feedback.

31.2. Date and Time Settings

The Date and Time Settings feature allow you to set the date, time, and time zone on the A5L Android head unit. You can switch between 24-hour and 12-hour formats as needed. The system supports automatic network time synchronization, ensuring accurate time display for functions such as navigation, schedule reminders, and log recording. Details are as follows:

1. Automatic date & time: Tap to select the time synchronization method. Options include Use network-provided time (syncs via Wi-Fi/Internet), Use GPS-provided time (syncs via satellite signal), or Off (allows manual adjustment).
2. Set date / Set time: These options become active only when Automatic date & time is set to Off. Tap to manually input the current date and time.
3. Select time zone: Tap to enter the time zone configuration menu. You can manually select your Region (Country) and the specific Time zone (City/Area) to ensure the clock displays the correct local time.
4. Automatic 24-hour format: Tap to enable/disable. When enabled, the system uses the default time format based on your selected locale/language settings.
5. Use 24-hour format: This toggle is adjustable when Automatic 24-hour format is turned off. Tap to switch the clock display between 12-hour format (e.g., 1:00 PM) and 24-hour format (e.g., 13:00).

Operation Steps

• Navigation Path: Navigate to Settings > System > Date & Time

31.3. Reset Options

The System Reset feature allows you to restore default settings, resolve performance issues, or remove unwanted data. Available reset options include:

1. Reset App Preferences: Resets disabled apps, default apps, and permission settings.
2. Factory Data Reset: Erases all personal data, apps, and settings from the device.

Note: All personal data will be erased and cannot be recovered. Before performing a reset, back up important files to an external storage device.

Operation Steps

1. Step 1: Navigate to Settings > System > Reset options.
2. Step 2: Choose the desired option: App Preferences or Factory Data Reset.
3. Step 3: Confirm your selection and follow on-screen instructions to complete the reset.

31.4. About Device

The About Device page displays hardware and software version details of the head unit. It is read-only (except for the update menus) and mainly serves to:

• Confirm system software versions and perform updates;
• Provide reference information (such as Device ID and MCU Version) for customer service or technical support;
• Check network status and device identifiers.

Key Information include:

1. Update Menu:
   • Wireless Update: Perform system updates over the air (OTA) via Wi-Fi. OTA (Over-The-Air) technology allows you to update the head unit's operating system wirelessly via a Wi-Fi or hotspot connection. This feature ensures your device evolves over time, delivering new functionalities, system stability improvements, and critical bug fixes without the need for complex cables or computer connections.
   • Local Update: Perform system updates using a USB drive or SD card.
   • CAN Update: Specific option to update the CANBUS protocol software.
2. Legal information: Displays system legal terms and open-source licenses.
3. Android version: Displays the main version number of the Android OS
4. Network Addresses:
   • IP address: Shows the current network IP addresses
   • Wi-Fi MAC address: The unique hardware address for the Wi-Fi module.
   • Bluetooth address: The unique hardware address for the Bluetooth module.
5. Device ID: A unique alphanumeric identifier string for this specific head unit.
6. Build number: The specific system software build version, used to track software iterations.
7. MCU version: The firmware version of the Microcontroller Unit, which manages hardware controls like power and buttons.
8. Electronic QR code: A digital identification code for the device.

Operation Steps

1. Step 1: Navigate to Settings > System > About device.
2. Step 2: Scroll through the list to review specific information such as the MCU version or Build number, or select an Update option if needed.

Note: OTA updates provide continuous system improvements, including bug fixes, performance optimizations, and new features. We recommend checking for updates periodically to ensure your device runs at its best.

32. Troubleshooting

This chapter provides guidance for diagnosing and resolving common issues that may occur during the installation or daily use of the A5L series Android head unit. By following the recommended solutions carefully, most issues can be resolved directly.

Important Notes:

1. If you have checked the points described in this chapter and the problem still persists, turn off the vehicle for about ten seconds and then restart it.
2. If the issue remains unresolved after applying the suggested solutions, please contact ATOTO Customer Service for further assistance.

32.1. General Issues

(1) Issue Description: No response / Screen or unit not powered on / Bad or incorrect picture quality.

Solution: Restart the unit by turning off the vehicle for ten seconds, then turning the vehicle back on.

(2) Issue Description: No sound from the unit.

Solution:

• The unit is muted. Adjust the volume.
• Select the correct audio source on the unit.

32.2. USB Playback Issues

(1) Issue Description: Cannot play a media file.

Solution:

• The file format on the USB flash drive is not supported by the unit. Change media files format.
• The file system of the USB flash drive is not supported by the A5L Android head unit. Change the USB drive.

(2) Issue Description: No video playback or picture display.

Solution: Video or picture display is enabled only when the parking brake is engaged, and the parking brake input wire is connected to your vehicle.

32.3. Bluetooth Connection Issues

(1) Issue Description: The A5L Android head unit cannot make Bluetooth streaming.

Solution:

• Make sure your mobile phone is within Bluetooth range.
• Pair and connect your mobile phone.
• Apple CarPlay or Android Auto is being connected. Disconnect your mobile phone from the A5L Android head unit to enable Bluetooth connection.

(2) Issue Description: Poor hands-free phone call quality.

Solution: Check signal strength on your mobile phone.

(3) Issue Description: Cannot make Bluetooth connection.

Solution:

• Apple CarPlay/Android Auto connection disables Bluetooth on the A5L Android head unit. Disconnect Apple CarPlay or Android Auto from the A5L Android head unit to enable Bluetooth connection.
• The unit is already connected to a mobile device. Disconnect the current Bluetooth connection before connecting to another Bluetooth device.

32.4. Apple CarPlay/Android Auto Issues

(1) Issue Description: Cannot start Apple CarPlay/Android Auto

Solution:

• The mobile phone is locked. Unlock it.
• CarPlay/Android Auto is frozen. Unplug the mobile phone, close all apps and plug the phone in again.

32.5. FM/AM Radio Issues

(1) Issue Description: Poor radio reception.

Solution:

• The external FM/AM antenna is not connected or extended. Connect and secure an external FM/AM antenna.
• Turn off RDS, TA and AF.

33. Technical Specifications

Here are the detailed specifications for the ATOTO A5LG2B7T head unit:

General

• Operating System: Android 9.0
• SOC chipset:
  • CPU: MT8163 Quad-Core 1.3GHz (Cortex-A53)
  • GPU: Mali-T720 MP2
• Memory:
  • Internal RAM/ROM: 2 GB+32 GB (Note: The available internal storage may be smaller as part of the internal storage is occupied by software. Actual memory space may change due to application updates, user operations, and other related factors)
  • External TF card Slot: Support 128 GB
• Wi-Fi Network:
  • Wi-Fi band: 2.4GHz, 5GHz
• Monitor:
  • Screen Size (inch): 7 inches (diagonal)
  • Display Resolution: HD 1280*720
  • Display system: IPS LCD display panel
  • Lighting Brightness: 600cd/m2
• Radio:
  • Reception Band: FM (88-108MHz); AM (530-1700KHz)
  • RDS Decoder: YES
  • Digital Audio Out: YES
  • Stereo Audio DAC: YES
• Bluetooth:
  • Bluetooth Version: Bluetooth 4.1
  • Protocol: HFP,HSP,A2DP,AVRCP,GATT
  • A2DP Audio Codec: SBC
  • Channel output: Stereo
  • Support Bluetooth Tethering & BLE Connection
• DSP Acoustics:
  • EQ Band: 48 Bands
  • Frequency: 16--18K (Hz)
  • Gain: -12--12 (dB)
  • Preset EQ: News/Jazz/City/Pop/Electronic/Classic/Movie/Rock/Techno
• Pre-Amplifier:
  • Power Output: 4 x 45W/ 4 Ω max. 4 x 24w RMS/4 Ω @ 14.4 V, 1 kHz, THD 10%
  • Speaker Impedance: 4-8Ω
  • Output Frequency Band: 20 – 22000 Hz
• Media Playback:
  • Audio:
    • D/A Converter: 24Bit
    • Audio decode: WAV, MP3, MP2, FLAC,APE AAC, AMR-NB, AMR-WB, MIDI, Vorbis, AAC-plus v1, AAC-plus v2, WMA, ADPCM
  • Video:
    • H.263/H.264/DIVX4-6/XVID Decoder: 1080p@30fps
    • MPEG-4 Decoder: 1080p@30fps
    • MPEG-2 Decoder: 1080p@30fps
    • VP8/VP9 Decoder: 1080p@30fps
    • HEVC/H.265 Decoder: 1080p@30fps
• GPS:
  • Supports: GPS/QZSS/SBAS (WAAS/MSAS/EGNOS/GAGAN)
  • Positioning time:
    • Cold start: <55s (OPEN SKY)
    • Hot start: <5s (OPEN SKY)
  • Rate: 0.1m/s
  • Location data update rate: 5HZ
  • Satellite channel: 64 channels
  • Positioning height: 18,000m
  • Positioning accuracy: 3m, 2D
• Output & input:
  • USB Data interface: 2 USB interfaces
  • Power output: 5V, 500-800mA during data transfer
  • Audio Out:
    • 4 x RCA Out (2V/10kΩ): Labeled as ///
    • 1 x RCA Subwoofer Out(1V/10kΩ): Labeled as
  • AUX Audio Input:
    • 2 x Audio Input (Left / Right) (1V/25kΩ): Labeled as /
  • AUX Video Input:
    • 1 x Video Input (1Vp-p/75Ω): Labeled as
  • FCAM video input:
    • 1 x Video Input (1Vp-p/75Ω): Labeled as
  • Rear View Camera Input:
    • 1 x Video Input (1Vp-p/75Ω): Labeled as
  • Video Output: Available. Utilize the car stereo's HDMI port for video output. For audio, please connect to the RCA output.
  • Optical Output: Not available.
• General:
  • Operation Voltage: 12v DC car battery
  • Rated Current Consumption: 15A
  • Operation Temperature Range: -20°C - +65°C

34. User Tips

• Keep Software Updated: Regularly check for OTA updates to ensure optimal performance, new features, and improved protection. This can be done via Settings > System > About device > Update Menu > Wireless Update.
• Optimize Audio: Utilize the 48-band EQ and time alignment features in the Equalizer App to fine-tune your audio experience. Experiment with different presets and custom settings to match your music and mood.
• Safe Driving Practices: Always prioritize safety. Use voice commands (DriveChat) for hands-free operation, and avoid watching videos or making complex adjustments while driving. Pull over to a safe location if extended interaction with the head unit is needed.
• Internet Connectivity: For stable and fast internet, consider using USB tethering with your smartphone. If USB tethering is not supported, Wi-Fi hotspot or Bluetooth tethering are alternative options.
• GPS Tracking: For comprehensive vehicle tracking, ensure the TrackHU app is enabled and linked to the TrackHU Manager Web Portal on your mobile device. This allows for real-time tracking, geofencing, and alerts.
• Screen Care: Treat the capacitive touchscreen like a smartphone. Avoid wet fingers, prolonged direct sunlight, excessive force, and sharp objects. Clean with a dry, soft cloth or a cloth moistened with neutral detergent.