... than other supplier. product feature Part number:SG-339 mini portable multimedia speakerinterface:USB,SD card,3.5mm stereo jacksupport resource:U ... card,PC,MP3/MP4Power supply:DC 5v/Li batteryfunction:music player/loudspeaker/FM radio technical parameter: Output power: 5W(2.5w ... cameras,headphones,etc.and our digital products covers from Mp3 player/Mp4 players,to mini speakers,etc.We are a powerful ...