speaker support SD card/U-disk 3.5mm audio CABLE external battery/DC 5V mini size:220*70*38mm FM radio,1. ... conveniently.4,without the supply of other power,its Li battery can be4 hours.5,good bass stereo effect for your ... ,MMC/DC card,PC,MP3/MP4Power supply:DC 5v/Li battery,500MAH,4hours.function:music player/loudspeaker/FM radiocolor:silver,black ...