... SD , remote control . Plays Mp3 and wav files . Suitable for HI-Fi system , amplifier 1.Product Features *With USB / SD / ... for setting Time , Alarm in standby statusMode : Switch order will be USB→SD→AUX→FM→USB (if have USB ... stop playing ,when you press play , it will start form first song again.MUTE : Press for mute, press again ... save ane exit setting. WAV MP3 Player Module, HI-FI Audio Player