Kebidumei 80W Bluetooth 5.0 MP3 Amplifier Decoder Wireless Recording Board USB MP3 Player Decoding Board Module 5V 12V S

PLAY / PAUSE: the short press is to switch between pause and play
PLAY / PAUSE: the long press is a radio FM automatic station
PREV / VOL-: the short press is to select the previous song
PREV / VOL-: the long press is to decrease the volume
NEXT / VOL +: the short press is to select the next song
NEXT / VOL +: the long press is to increase the volume