MP3 decoder board: Connect to U disk (maximum support 32GB)
LED Color Screen: Digital Screen Display, Red Screen Display.Infrared receiving module
TF: Connect to TF memory card (maximum support 32GB).AUX: Audio Input Interface
VOL-: Short press is the last song; Long press is the volume reduction.PLAY/PAUSE: Short press is the switch between pause and playback; Long press is the radio FM automatic station.
VOL+: Short press is to choose the next song; Long press is to increase the volume.MODE: Switchover of USB/TF/FM/LINE IN/BLUETOOTH Voice