... player,Mobile phone,etc2,it has the function of FM radio.the storage can be over 20 channels3,it has a ... than other supplier. product feature Part number:SG-339 mini portable multimedia speakerinterface:USB,SD card,3.5mm stereo jacksupport resource ... /MP4Power supply:DC 5v/Li batteryfunction:music player/loudspeaker/FM radio technical parameter: Output power: 5W(2.5w+2,5w)Loud ...