Amplifier 2 Channel Output Power / USB / FM / AUX / SD Card Hi Fi Stereo

Treble:adjust the treble of ext device Bass:adjust the bass of ext device Volume Control/Power Switch Power Led Prev/CH-:Down the play button key or FM station backward PLAY/SCAN:Pause/play Key or FM station automatic search NEXT/CH+:Upward play button key or FM station selection forward USB. FM . AUX signal input select Key Remote receiving window USB disk interface function indicating lamp SD card interface