Introduction
Thank you for choosing the Gearelec M12 Car MP3 Player. This manual provides detailed instructions for the installation, operation, and maintenance of your new car stereo. Please read this manual thoroughly before use to ensure proper functionality and to maximize your listening experience.

Product Features
- FM Radio Tuner (87.5~108MHz)
- TF Card/USB Flash Drive Reader for audio playback
- AUX Input Function
- Bluetooth 5.0 for wireless audio streaming and handsfree calls
- RCA Audio Output for subwoofer connection
- Customizable Colorful Button Lights
- USB Charging Output for mobile phones (1.5A)
- Voice Control Function (via connected smartphone)
- Mobile App Control Function
- 'Locate and Find My Car' feature via app

Specifications
| Feature | Specification |
|---|---|
| Model | M12 Car Stereo 1 DIN |
| Shell Size | 188 x 58 mm (7.40 x 2.28 inches) |
| Item Weight | 398g |
| Install Size | 1 Din |
| Material | ABS+Metal |
| Software Solution | 4900C |
| Radio Frequency | FM 87.5~108MHz |
| Radio IC | Chip Integration |
| Power Amplifier IC | TDA7388 |
| Output Power | 60W x 4 |
| Working Voltage | 12~14.4V |
| Working Temperature | -10~+60 ℃ |
| Bluetooth Version | 5.0 (Default Name: Car-BT) |
| Mobile Phone Interconnection | Supports App Control |
| USB Port | 2 front USB ports (1 for charging, 1 for USB 2.0 reading) |
| TF Card Support | Yes (up to 32GB, referred to as 'Computer Memory Size' in some listings) |
| Audio Output | 2 channels (Left + Right) |
| Audio Input | Front AUX (Left + Right) |
| Audio Format Support | MP3/WMA/WAV/FLAC |
| OSD Language | English |
| Display Size | 2.5" |
| Certification | CE |
Note: Specifications are subject to change without prior notice.

Package Contents
The following items are included in your Gearelec M12 Car MP3 Player package:
- 1 x Head Unit
- 1 x Remote Control (Batteries not included)
- 2 x Removal Keys
- 2 x Power Cords (Wiring Harness)
- 1 x User Manual

Setup and Installation
Important: Professional installation is highly recommended to avoid damage to the unit or your vehicle's electrical system. Incorrect wiring can cause serious damage.
- Preparation: Disconnect the negative terminal of your car battery before starting any electrical work.
- Mounting: Insert the head unit into the 1-DIN opening in your dashboard. Secure it using the provided removal keys and mounting hardware.
- Wiring: Connect the power cords (wiring harness) to your vehicle's electrical system. Ensure correct connections for constant power (yellow), accessory power (red), ground (black), and speaker outputs.
- Antenna: Connect your car's FM antenna to the antenna input on the back of the head unit.
- Optional Connections: If using a subwoofer, connect the RCA audio output from the head unit to your amplifier/subwoofer.
- Final Check: Double-check all connections before reconnecting the car battery.

Operating Instructions
Basic Operation
- Power On/Off: Press the power button (usually the knob) to turn the unit on or off.
- Volume Control: Rotate the central knob to adjust the volume.
- Mode Selection: Press the 'MOD' button to cycle through available modes: Radio (FM), USB, TF Card, AUX, Bluetooth.
- Mute: Press the 'MUTE' button to temporarily silence the audio.
Radio Operation
- Frequency Tuning: In FM mode, use the 'PREV' and 'NEXT' buttons to manually tune or seek stations.
- Auto Scan/Store: Long press the 'AMS' button to automatically scan and store available FM stations.
- Preset Stations: Use buttons 1-6 to select stored preset stations.

Media Playback (USB/TF Card)
- Insert a USB flash drive or TF card into the respective slot. The unit will automatically switch to USB/TF mode and begin playback.
- Use 'PREV' and 'NEXT' buttons for track navigation.
- Use 'PLAY/PAUSE' button for playback control.
Bluetooth Handsfree Calling
The M12 features Bluetooth 5.0 for stable and fast connections.
- Pairing: Enable Bluetooth on your smartphone and search for 'Car-BT'. Select it to pair.
- Answering/Dialing: Short press the 'BND' key to answer an incoming call or dial a number.
- Rejecting/Hanging Up: Short press the 'MOD' key to reject an incoming call or hang up an ongoing call.
- Redial: Short press the 'MOD' key to redial the last number.

Voice Assistant Function
In Bluetooth mode, you can activate your smartphone's voice assistant directly from the M12 unit.
- Activation: Long press the central knob to wake up the voice assistant (e.g., Siri, Google Assistant) on your connected phone.

Mobile App Control
Control your M12 player and access additional features using the dedicated mobile app.
- Download: Scan the QR codes provided in the product images or search for the app on Google Play or the App Store.
- Connection: Connect the radio to your phone via Bluetooth.
- Features: The app allows you to control various functions, change button colors, and utilize the 'Locate and Find My Car' feature.

USB Charging
The M12 unit provides a dedicated USB port for fast charging your mobile devices.
- Connection: Plug your device's USB charging cable into the designated USB charging port on the front panel.

Colorful Lights Random Switching
Customize the aesthetic of your car stereo with dynamic colorful lighting.
- Mode Selection: Briefly press the knob several times until 'Auto' is displayed on the screen. This activates automatic color cycling.
- Manual Color Change: While in 'Auto' mode, rotate the knob to manually select a specific color.

Maintenance
- Cleaning: Use a soft, dry cloth to clean the unit's surface. Do not use abrasive cleaners or solvents.
- Avoid Moisture: Keep the unit dry and away from excessive moisture.
- Temperature: Operate the unit within the specified working temperature range (-10~+60 ℃).
Troubleshooting
- No Power: Check all power connections and fuses. Ensure the car battery is properly connected.
- No Sound: Verify speaker connections. Check volume levels and ensure the unit is not muted. Confirm the correct audio source is selected.
- Bluetooth Not Connecting: Ensure Bluetooth is enabled on your phone and the unit. Delete previous pairings and try re-pairing. Make sure the unit name 'Car-BT' is selected.
- USB/TF Card Not Reading: Ensure the media is inserted correctly. Check if the audio files are in a supported format (MP3/WMA/WAV/FLAC). Try a different USB drive or TF card.
- Radio Reception Poor: Check the antenna connection. Ensure you are in an area with good signal strength.
User Tips
- For optimal sound quality, consider connecting an external amplifier and subwoofer using the RCA audio outputs.
- Regularly update the mobile app to ensure access to the latest features and improvements.
- When using the 'Locate and Find My Car' feature, ensure your phone's location services are enabled and the app has the necessary permissions.
Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.





