User Manual
Thank you for choosing the ELECTROPRIME B5303 10.26 inch Portable Car MP5 Player. This device is designed to enhance your in-car entertainment and connectivity experience, offering a wide range of features including wireless CarPlay and Android Auto, Bluetooth connectivity, media playback from various sources, and FM transmission.
This manual provides detailed instructions on how to set up, operate, and maintain your new car MP5 player. Please read it thoroughly before use to ensure proper installation and optimal performance.
The ELECTROPRIME B5303 is a versatile portable car MP5 player featuring a large 10.26-inch display. Below is an image of the product and a list of items included in your package.

Figure 2.1: Front view of the ELECTROPRIME B5303 Portable Car MP5 Player displaying the CarPlay interface.
Note: Accessories, instructions, and packaging may be updated by the manufacturer from time to time. Please refer to the actual contents received.

Figure 2.2: Side view illustrating the various input/output ports on the ELECTROPRIME B5303. These include the Audio output, Reversing camera input, USB port for U disk reading, TF card slot, and the Power socket.
Follow these steps to properly set up and install your portable car MP5 player.
If you have an optional rearview camera, connect it as follows:
This section details the various functions and how to operate your ELECTROPRIME B5303.
The device supports playback of audio, video, and image files from SD cards and USB drives (U disk).
Supported Formats:
Connect your smartphone via Bluetooth for hands-free calling and audio streaming.
The device supports both wired and wireless CarPlay/Android Auto, as well as wired screen mirroring.
Transmit audio from the MP5 player to your car's FM radio.
Available Frequencies: 88.60, 89.20, 89.50, 89.80, 91.50, 91.80, 93.00, 93.60, 93.90, 94.50, 95.10, 95.70 MHz.
If a rearview camera is connected, the display will automatically switch to the camera view when the vehicle is put into reverse gear.
Proper maintenance ensures the longevity and optimal performance of your device.
If you encounter issues with your ELECTROPRIME B5303, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | No power supply; loose connection; blown fuse in vehicle. | Check if the cigarette lighter socket has power. Ensure the power cord is securely connected. Check vehicle's fuse box. |
| No sound from car speakers. | FM transmitter not set correctly; car radio not tuned to correct frequency; volume too low. | Ensure FM transmitter is enabled and set to an unused frequency. Tune car radio to the same frequency. Increase volume on both the MP5 player and car radio. |
| Bluetooth connection fails. | Bluetooth not enabled; device not in pairing mode; interference. | Ensure Bluetooth is enabled on both devices. Restart both devices. Try pairing again. Move closer to the device. |
| CarPlay/Android Auto not connecting. | Incorrect cable; phone settings; Wi-Fi/Bluetooth issues for wireless. | For wired, use a high-quality data cable. For wireless, ensure Wi-Fi and Bluetooth are on and connected. Check phone's CarPlay/Android Auto settings. Restart phone and MP5 player. |
| Rearview camera not displaying. | Camera not connected; incorrect wiring; faulty camera. | Verify the reversing video cable is securely connected. Ensure the camera is properly powered and wired to the reverse light trigger. Test with another camera if possible. |
If the problem persists after trying these solutions, please contact customer support.
Detailed technical specifications for the ELECTROPRIME B5303 Portable Car MP5 Player.

Figure 7.1: Dimensions of the ELECTROPRIME B5303 Portable Car MP5 Player. The main unit measures approximately 24.50 cm (9.65 inches) in width and 9.70 cm (3.82 inches) in height. The depth is about 2.50 cm (0.98 inches). The base measures 13.20 cm (5.20 inches) in width and 8.50 cm (3.35 inches) in depth.
| Feature | Detail |
|---|---|
| System | Quanzhi melis system |
| Software Solution | F133 |
| CPU | F133 |
| Running Memory | 1Gbit DRAM |
| Display Size | 10.26 inches |
| Display Resolution | 600x1600 |
| Bluetooth Version | 5.0 (Default Name: CarPlay) |
| WiFi Frequency | 2.4G/5G dual frequency |
| Radio Transmission Frequencies | 88.60/89.20/89.50/89.80/91.50/91.80/93.00/93.60/93.90/94.50/95.10/95.70 MHz |
| Radio Transmitter IC | AB5301B |
| Power Amplifier IC | CS8571E |
| Output Power | Built-in 1W speaker |
| Working Voltage | 12~30V |
| Working Temperature | -10~60 degrees Celsius |
| USB Interface | USB2.0 |
| AUX Port Parameters | Audio output: Supported; Reversing video input: Supported |
| Supported Languages | English, Chinese, Spanish, Portuguese, Russian, German, French, Polish, Turkish, Arabic, Hebrew, Italian, Czech, Japanese, Korean, Thai |
ELECTROPRIME products are designed for reliability and performance. For warranty claims, technical support, or service inquiries, please refer to the retailer or manufacturer's official support channels.
Please note that the manufacturer reserves the right to update accessories, instructions, and packaging without prior notice. Always refer to the latest information provided with your product or on the official ELECTROPRIME website for the most current details regarding warranty and support.
For further assistance, please contact your point of purchase or visit the ELECTROPRIME official website.
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