1. Introduction
Thank you for purchasing the BQCC 4-inch Touch HD Screen Car MP5 Player. This device is designed to provide a comprehensive in-car entertainment and multimedia experience, featuring a touch-sensitive HD screen, FM radio, Bluetooth connectivity, USB and TF card playback, and support for a reversing camera. This manual will guide you through the installation, operation, and maintenance of your new car MP5 player.
2. Package Contents
Please check the box for the following items:
- 1 x BQCC 4-inch Car MP5 Player Host
- 1 x Remote Control
- 1 x Steering Wheel Remote Control
- 1 x Instruction Manual
- 1 x Tail Cable (Wiring Harness)

3. Specifications
| Feature | Specification |
|---|---|
| Model | 4022D |
| Type | Car MP5 Player |
| Voltage | 12V / 14.4V |
| System | Allwinner WIN-CE system |
| Decoding Chip | Quanzhi C500 |
| Screen Size | 4.1 inches |
| Screen Resolution | 800*480 |
| Panel Size | 188mm x 58mm |
| Host Depth | 60mm |
| Machine Weight | 0.43kg |
| Radio Chip | QN8035 |
| Languages | English, Simplified Chinese, Spanish, French, Portuguese, Russian, German, Italian, Japanese, Polish, Turkish, Czech, Hebrew, Greek |
| Bluetooth Version | 5.0 |
| Power Amplifier Chip | TDA7388 |
| Radio Frequency | FM 87.5M-108M |
| SD Card Slot | Mini TF card |
| USB Interface | Yes (Front USB) |
| RCA Terminals | 2 Audio Outputs, 1 Reverse Input, 1 Video Output, 1 Video Input, 1 Subwoofer Output |
| Front AUX Audio Input | Yes |
| Supported Audio Formats | MP3/WMA/WAV/OGG/FLAC/APE |
| Supported Video Formats | RM/RMVB/MP4/FLV/MKV/3GP/AVI/ASF/SWFMP1/MP2 |
| Supported Image Formats | JPG/BMP/PNG |
4. Installation
4.1. Dimensions
Ensure your vehicle's dashboard opening is compatible with the player's dimensions:
- Installation Dimensions: 178mm x 52mm
- Shell Size: 188mm x 58mm

4.2. Wiring Connections
Refer to the wiring diagram below for proper connection. Incorrect wiring can damage the unit or your vehicle's electrical system. The unit features built-in wiring protection to prevent damage from reverse power connections.


Key Connections:
- ISO Plug: Connects to your vehicle's standard ISO wiring harness for power and speaker connections.
- RCA Outputs: For connecting external amplifiers or subwoofers (Left Channel Output, Right Channel Output, Subwoofer Output).
- Video Output: For connecting to external displays.
- Video Input: For connecting external video sources.
- Reversing Camera Input: Connect your reversing camera here. The unit will automatically switch to the camera view when reverse gear is engaged (if properly wired).
- Radio Antenna: Connect your car's radio antenna.
- USB Port: Located on the front panel for media playback and charging.
- TF Card Slot: For media playback from a mini TF card.
- AUX Input: 3.5mm jack on the front panel for external audio devices.
4.3. Mounting
The unit is designed for in-dash installation. Use the provided mounting brackets to secure the player in your vehicle's dashboard opening.

5. Panel Button Introduction
Familiarize yourself with the buttons and interfaces on the front panel:

- MIC: Microphone pickup hole.
- MUTE: Mute button.
- ◄◄ (Previous Track): Short press for previous track; long press for fast rewind.
- ►► (Next Track): Short press for next track; long press for fast forward.
- ▲ (Answer Call): Answer incoming calls.
- ▼ (Hang Up Call): End calls.
- ▶/M (Power Switch/Mode): Short press to switch modes (Radio, USB, TF, AUX, Bluetooth); long press to power on/off.
- BAND/APS: Band switching (FM1, FM2, FM3); long press for automatic search and store radio stations.
- AUX: 3.5mm auxiliary input jack.
- Volume Knob: Rotate to adjust volume; press to confirm selections.
- 1-6 Number Buttons: Radio presets; also used for specific functions in different modes (e.g., 3 for external video, 4 for music/video switching).
- TF: TF card slot.
- RES (Reset Hole): Use a thin object to press for system reset.
- USB Port: For USB drive media playback and charging.
6. Operation
6.1. Power On/Off and Mode Selection
Press and hold the ▶/M button to power the unit on or off. Short press the ▶/M button to cycle through available modes: Radio, USB, TF Card, AUX, and Bluetooth.
6.2. Radio Function
In Radio mode, use the BAND/APS button to switch between FM1, FM2, and FM3 bands. Long press BAND/APS to automatically search and store radio stations. Use the ◄◄ and ►► buttons to manually tune or seek stations. The 1-6 number buttons can be used to select stored preset stations.

6.3. Media Playback (USB/TF Card)
Insert a USB drive into the front USB port or a mini TF card into the TF card slot. The player will automatically switch to the corresponding mode or you can select it manually. The unit supports various audio (MP3/WMA/WAV/OGG/FLAC/APE), video (RM/RMVB/MP4/FLV/MKV/3GP/AVI/ASF/SWFMP1/MP2), and image (JPG/BMP/PNG) formats.


6.4. Bluetooth Connection
Activate Bluetooth on your mobile device and search for available devices. Select 'SWL-BT' (default name) to pair. Once connected, you can make/receive calls and stream audio wirelessly. The unit uses Bluetooth 5.0 technology for stable connections.

6.5. Reversing Camera Function
If a reversing camera is connected to the dedicated input, the display will automatically switch to the camera view when the vehicle is put into reverse gear. This feature supports high-definition cameras for clear visibility.

6.6. Steering Wheel Remote Control
Use the provided steering wheel remote control to operate the player without touching the screen, allowing for convenient adjustment of volume, tracks, and modes.

6.7. Colorful Button Lights
The unit features customizable button lights with 7 colors that can cycle through or be set to a single color (Red, Blue, Yellow, Green, Cyan, Purple, White).

7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the unit's surface. For the screen, use a screen-specific cleaning solution and a microfiber cloth. Do not use abrasive cleaners or solvents.
- Avoid Liquids: Keep the unit away from water and other liquids to prevent damage.
- Temperature: Avoid exposing the unit to extreme temperatures, direct sunlight for prolonged periods, or high humidity.
- Fuse Replacement: If the unit does not power on, check the fuse in the wiring harness. Replace it with a fuse of the same rating if blown.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Incorrect wiring, blown fuse, power supply issue. | Check all power connections. Verify the fuse in the wiring harness and replace if necessary. Ensure the car battery has sufficient charge. |
| No sound from speakers. | Speaker wires disconnected, volume too low, incorrect audio source. | Check speaker wiring connections. Increase volume. Ensure correct audio source (Radio, USB, BT, AUX) is selected. |
| USB/TF card not recognized. | Unsupported format, corrupted media, improper insertion. | Ensure media is formatted correctly (FAT32 recommended). Check if files are in supported formats. Reinsert the USB/TF card. Try a different USB/TF card. |
| Bluetooth connection issues. | Device not in pairing mode, interference, incorrect pairing process. | Ensure Bluetooth is enabled on both devices. Delete previous pairings and re-pair. Move closer to the unit. |
| Reversing camera not displaying. | Camera not connected, incorrect wiring, camera malfunction. | Check the reversing camera input connection. Ensure the camera is receiving power and functioning correctly. Verify the reverse trigger wire is connected. |
| Touch screen unresponsive. | System glitch, screen damage. | Perform a system reset using the RES hole. If the issue persists, contact support. |
9. User Tips
- USB Port Functionality: The front USB port supports both media playback from USB drives and charging for compatible devices. Ensure your USB drive is properly inserted for media access.
- Touch Screen Interaction: The unit features a responsive touch HD screen for intuitive control. For precise input, use light touches.
- Audio Equalization: While not explicitly detailed, many car MP5 players include basic equalization settings (e.g., Bass, Treble, Balance, Fader) within the audio settings menu. Explore the 'Sound' or 'Audio' options in the system settings for customization.
- Steering Wheel Control Setup: If your vehicle supports steering wheel controls, ensure the steering wheel remote control is properly paired or configured according to the instructions to maximize convenience.
10. Warranty and Support
10.1. Warranty Information
BQCC provides a one-year manufacturer's limited warranty for defective items from the date of receipt. Accessories typically come with a 3-month warranty. Additionally, a 365-day free replacement warranty is offered for quality problems within the scope of the manufacturer's warranty service (excluding non-human damage like wrong wiring, dropping, or water damage).
Warranty Process for Free Replacement:
- Buyer Contacts Seller: Initiate contact with the seller regarding the issue.
- Confirm Quality Problems: The seller will confirm if the issue is a quality problem covered by warranty.
- Buyer Returns Item to Seller: The buyer sends the product back. The cost of returning the product is typically borne by the buyer.
- Seller Receives Return: The seller receives and inspects the returned product.
- Seller Sends a New One: If the return is valid, the seller arranges to send a new replacement. The cost of shipping the new replacement is typically borne by the seller.
To initiate a free replacement service, you may need to provide proof of purchase (order number) and evidence of the quality problem (e.g., video, product unique code).


10.2. Customer Support
For any questions, technical assistance, or warranty claims, please contact BQCC customer service through your purchase platform. Provide your order details and a clear description of the issue for prompt support.





