... mp3 speaker size:300*45*45mm the functions and the advantages of our mini speaker1,it can play music files automatic ... U-Disk,etc B,mobile device,such as PC,mp3/mp4 player,Mobile phone,etc2,it has a ... stereo jacksupport resource:U-disk,MMC/DC card,PC,MP3/MP4 playerPower supply:DC 5v/Li battery,1000MAH, ... cable connect external sound source such as PC,phone,MP3 player.etc1 pcs USB cableconnect your PC for ...