... phone,etc2,it has a small size:300(L)*45(W)*45(H)mm3its built-in Li ... jacksupport resource:U-disk,MMC/DC card,PC,MP3/MP4 playerPower supply:DC 5v/Li battery,1000MAH ... response:90hz-20khzsensitivity600+/-100mvsound&noise rate :>=70dbdemension:300(L)*45(W)*45mm(H)input voltage:DC5vbatterybuilt-inweight:199 ... connect external sound source such as PC,phone,MP3 player.etc1 pcs USB cableconnect your PC for ...