3.7V MP3 motherboard with Bluetooth audio & amplifier

Product name Bluetooth decoder with amplifier

Input voltage Battery 3.7V, DC 5V

Function Bluetooth + radio + AUX + call + lossless decoding + USB + TF card + 2x3W

Accessories 3 2P cables + 1P radio cable

Packaging 600 sets/box; OPP bag single set packaging;

Customizable PCB + software + screen printing LOGO on the shell

I. Main functions

1. Dual decoding supports music in MP3/WMA/WAV/FLAC/APE lossless decoding formats;

2. Support Bluetooth call function;

3. Support MMC/SD/MMA and other cards, support USB interface (U disk);

4. Power-off memory function;

5. Support external audio source input LINE IN;

6. Support FM radio, search frequency band (87.5MHZ-108.0MHZ);

7. Buttons: three-button control, VOL-/AUTO/VOL+ ;

8. Amplifier: 2x3W

II. Calling function description

1. Short press the PLAY/PAUSE button to answer the call;

2. Long press the PLAY/PAUSE button to refuse to answer the call;

3. Powered by rechargeable battery, supports micro USB 5V input to charge the battery;

III. Detailed button operation

1. VOL-button (previous song/volume reduction): In MP3 mode, VOL-short press is for the previous song, long press is for volume reduction; in FM mode, short press is for up one station number; in Bluetooth mode, short press is for Bluetooth previous song, long press is for volume reduction.

2. AUTO button (play/pause): In MP3 mode, AUTO short press is for play/pause; in FM mode, short press is for play/pause, long press is for automatic reception and storage of stations; in Bluetooth mode, short press is for play/pause.

3. VOL+ button (next song/volume up): In MP3 mode, short press VOL+ for the next song, long press for volume up; in FM mode, short press for down one station number; in Bluetooth mode, short press for the next Bluetooth song, long press for volume down.