Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Hikity CarPlay Double DIN Car Stereo. Please read this manual thoroughly before using the product to ensure proper function and safety. Keep this manual for future reference.
Product Overview
Key Features
- 7-inch Capacitive Touch Screen with 1024x600 HD Resolution
- CarPlay and Android Auto support via USB cable
- Bluetooth for hands-free calls and music streaming
- Mirror Link function for iOS/Android phones
- FM Radio with 18 preset stations
- Steering Wheel Control (SWC) compatibility
- Rear View Camera input with included camera
- Multiple audio/video/image format support
- Built-in EQ settings for sound customization
Package Contents and Dimensions
Verify that all items are present in the package before installation.

Figure 1: Package Contents and Product Dimensions. The stereo measures approximately 178mm (width) x 102mm (height) x 48mm (depth). The image also details the rear panel connections and lists accessories like the power cable, AUX harness, microphone, camera cable, brackets, rear camera, user manual, and two USB extension cables.
Setup and Installation
Safety Precautions
- Disconnect the vehicle's negative battery terminal before installation to prevent electrical shorts.
- Ensure proper insulation of all wire connections.
- Consult a professional if you are unsure about any installation steps.
Wiring Diagram
Refer to the following diagram for correct wiring connections. Incorrect wiring can damage the unit or your vehicle's electrical system.

Figure 2: Rear Panel Connections. This image illustrates the various ports on the back of the stereo, including connections for power, AUX harness, radio antenna, two USB cables, and the AUX rear view camera input.
Camera Connection

Figure 3: Rear View Camera Connection. This diagram shows how to connect the included rear camera to the stereo's dedicated signal input, ensuring proper functionality for parking assistance.
AUX Wire Harness Connections

Figure 4: AUX Wire Harness Connections. This image details the various audio and video connections available through the AUX wire harness, including inputs and outputs for external devices, subwoofer, and microphone. This diagram is part of the overall package contents image.
Operating Instructions
CarPlay and Android Auto
Connect your smartphone via a USB cable to enable CarPlay (for iOS) or Android Auto (for Android devices). This allows access to navigation, calls, messages, music, and other compatible apps directly from the stereo's display.

Figure 5: CarPlay and Android Auto Interface. This image demonstrates the user interface when CarPlay or Android Auto is active, displaying common application icons and the connection method via USB.
Bluetooth Connectivity
Pair your mobile phone with the stereo via Bluetooth for hands-free calling and wireless audio streaming. Access your phonebook and call history directly from the unit.

Figure 6: Bluetooth Interface. This image shows the stereo's display during a Bluetooth call, including the dial pad and call management options, highlighting the hands-free communication feature.
Mirror Link Function
Use the Mirror Link function to display your smartphone's screen directly on the car stereo. Connect your phone via USB and follow the on-screen prompts to synchronize the display. This feature supports both iOS and Android devices.

Figure 7: Mirror Link Display. This image illustrates how the Mirror Link function duplicates a smartphone's screen onto the car stereo, showing examples for both iOS and Android devices, including navigation and app interfaces.
FM Radio
The built-in FM tuner allows you to listen to your favorite radio stations. The unit supports 3 bands (FM1, FM2, FM3) and can store up to 18 stations. The frequency range is 87.5-108.0 MHz.

Figure 8: FM Radio Interface. This image shows the FM radio screen, detailing the frequency display, preset station indicators, and control buttons for tuning and station management.
Steering Wheel Control (SWC)
Configure the SWC function to control the stereo directly from your vehicle's steering wheel buttons. This allows for safe and convenient operation, such as adjusting volume, changing tracks, or answering calls, without taking your hands off the wheel.

Figure 9: Steering Wheel Control Setup. This image displays the SWC learning screen, guiding users through the process of mapping their steering wheel buttons to stereo functions.
Backup Camera Display
When the vehicle is shifted into reverse, the stereo automatically displays the feed from the connected rear view camera, providing parking assistance with dynamic guidelines.

Figure 10: Backup Camera View. This image shows the stereo displaying the rear view camera feed with colored parking guidelines, assisting the driver during reverse maneuvers.
Equalizer (EQ) Settings
Customize your audio experience using the built-in equalizer. Adjust frequency bands and speaker balance to achieve your preferred sound profile within the vehicle.

Figure 11: Equalizer Settings. This image displays the stereo's EQ interface, allowing users to fine-tune audio output by adjusting various frequency levels and speaker balance.
Maintenance
- Cleaning the Screen: Use a soft, lint-free cloth to gently wipe the touchscreen. Avoid abrasive cleaners or solvents.
- Software Updates: Check the manufacturer's website periodically for any available software updates to ensure optimal performance and compatibility.
- General Care: Avoid exposing the unit to extreme temperatures, direct sunlight for prolonged periods, or excessive moisture.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Incorrect wiring; Blown fuse; Loose connection. | Check power cable connections. Verify fuse integrity. Ensure all wires are securely connected. |
| No sound | Volume too low; Mute activated; Incorrect speaker wiring. | Increase volume. Check if mute is active. Verify speaker connections. |
| CarPlay/Android Auto not connecting | Faulty USB cable; Phone not compatible; Software issue. | Try a different USB cable. Ensure your phone's OS is updated. Restart both phone and stereo. |
| Bluetooth not pairing | Bluetooth not enabled; Device not in pairing mode; Interference. | Ensure Bluetooth is enabled on both devices. Put the phone in pairing mode. Move away from other wireless devices. |
| Rear camera not displaying | Incorrect camera wiring; Camera faulty; Reverse trigger not connected. | Check camera video input and power connections. Ensure the reverse trigger wire is correctly connected to the vehicle's reverse light circuit. |
Specifications
| Brand | Hikity |
| Model Number | Hikity-Q3540A3 |
| Screen Size | 7 inches |
| Screen Resolution | 1024 x 600 HD |
| Connectivity Technology | Bluetooth, USB |
| Special Features | Touch Screen, Mirror Link, CarPlay, Android Auto |
| Compatible Devices | Universal Double DIN |
| Audio Encoding | Stereo |
| Surround Sound Channels | 4.1 |
| Video Encoding | AVI/3GP/MP4/MOV/MPG/MKV/VOB/RMVB/RM |
| Output Power | 45 Watts (per channel) |
| Total Wattage | 180 Watts |
| Number of Channels | 4 |
| Control Method | Touch |
| Dimensions (W x H x D) | 17.8 x 10.2 x 4.8 cm (approx. 7 x 4 x 1.9 inches) |
| Color | Black |
Warranty and Support
For warranty information and technical support, please refer to the contact details provided with your purchase or visit the official Hikity website. Keep your proof of purchase for warranty claims.
Manufacturer: Hikity
ASIN: B09B7444NM





