Micro SD USB card reader,FM -Mini audio board -SD/ USB card reader ,FM radio -ABS,oblong -MP3 ... Decoder Board(Mini audio board) Function and features:micro card reader,SD/USB MP3 Decoder Board, fm radio ... : 92*35mm More information:-Supporting SD/MMC Card and USB disk to play music-Support MP3 ... 100,including around 5 R&D StaffProduct Line: mini Card& USB reader speaker, portable FM radio speaker, mobile ...