2.1 Channel MP3 Power Amplifier Board

Main Functions

   1. Dual decoding supports lossless music formats such as MP3, WMA, WAV, FLAC, and APE ;

    2. Amplifier board with 2*50W + 100W, 2.1 speaker amplifier ;  using two TPA3116 chips; 

    3. Voltage range: 6V-24V; Current: not less than 2A; 

    4. Supports Bluetooth calling function, Bluetooth version 5.3;

    5. Supports recording function;

    6. Microphone support function; 

    7. Digital color screen display;

    8. Supports MMC/SD/MMA cards and USB interface (USB flash drive);

    9. Power-off memory function;

    10. Supports infrared remote control operation at a distance of 10 meters;

    11. Supports LINE IN input from external audio sources;

    12. Buttons: Five buttons for multi-directional control: TREBLE, BASS, ECHO, MIC, VOL / VOL-  /  AUTO / VOL+ /  MODE ;

 Detailed button operation

    1. TREBLE/BASS/ECHO/MIC.VOL: Switches between microphone volume (C), microphone reverb (E), treble (H), and bass (b); first switch to the mode, then press the previous or next track button to adjust; after 3 seconds of no adjustment, it will automatically confirm.

    2. PREV button (previous track): In MP3 mode, a short press of the PREV button skips to the previous track, while a long press decreases the volume; in FM mode, a short press moves the channel up one level; in Bluetooth mode, a short press skips to the previous track via Bluetooth.

    2. AUTO Button (Play/Pause): In MP3 mode, a short press of AUTO plays/pauses the audio; in FM mode, a short press plays/pauses the audio, and a long press automatically tunes and saves stations; in Bluetooth mode, a short press plays/pauses the audio, and a long press activates TWS functionality.

    3. NEXT button (next track): In MP3 mode, a short press of VOL+ skips to the next track, while a long press increases the volume; in FM mode, a short press tunes to the next station; in Bluetooth mode, a short press skips to the next track via Bluetooth.

    4. MODE button: Switches between USB/TF card/audio input/Bluetooth functions in sequence; long press for recording function;

Recording Function Description

    1. Press and hold the MODE button to start recording, and press and hold the MODE button again to cancel recording and play the recording file;

    2. When recording, you need to connect a storage device, such as a USB flash drive or TF card;