... "speaker built-in Li battery,1000mAh/DC 5V mp3 speaker size:300*45*45mm the functions and ... Disk,etc B,mobile device,such as PC,mp3/mp4 player,Mobile phone,etc2,it has a small size ... card,PC,MP3/MP4 playerPower supply:DC 5v/Li battery,1000MAH,7--9hours.function:music files player/loudspeaker/ ... connect external sound source such as PC,phone,MP3 player.etc1 pcs USB cableconnect your PC for charging package ...