Item Name :? audio decoder optical ?? Mode No.: ES-317M?? ? Specification: -Voltage:12V -Function:MP3 player+FM radio function -Broadcast mode:Supporting SD/MMC Card and USB disk to play music?????? -Shell color:Black or Silver -With LED reminding -With multifunctional keys in board -With infrared remote controller -Key function:Last song, next song, Volume control,EQ, Play/Pause, repeat -With automatic memory function, replay from the last song with the last volume what is storage. -Product including:? MP3 decoder, shell,controller -Application:Ordinary audio combination,Car audio,multimedia speaker,Subwoofer, AV amplifier, ELectronic toy and so on.