mini speaker :220*70*38mm support SD card/U-disk,FM 3.5mm audio cable external LI battery,500mAh/DC 5V ... /mp4 player,Mobile phone,etc2,it has the function of FM radio.the storage can be over 20 channels3,it has ... :DC 5v/Li battery,500MAH,4hours.function:music player/loudspeaker/FM radiocolor:silver,black,ect technical parameter: Output power: 5W(2 ...