1、Easy to Switch, Multiple Formats Supported: Bluetooth MP3 decoder board supports USB, memory card, Bluetooth, FM switching between switching. Support MP3 WMA WAV FLAC APE format music. 2、USB and Memory Card: Bluetooth MP3 decoder board supports USB and memory card switching, previous, next, volume adjustment, playback or pause. 3、Bluetooth Function: Bluetooth 5.3 sound decoder module supports Bluetooth previous, next, volume adjustment, play or pause, mute. 4、Power Off Memory: MP3 decoder board supports power off memory function, which can remember the songs and volume played before the power off to the current point. 5、Serial Communication Control: MP3 decoder board supports serial communication control, mode, volume, song selection, stop or play, loop selection.