Function:portable speaker box,speaker box,mini speaker box with radio,used for computer,MP3,MP4,SD card,CD,personal stereo, ... 4 hourBattery:USB ,DC 5V/8HFunction:portable speaker box,speaker box,mini speaker box with radio,used for computer,MP3,MP4,SD card,CD ... ,personal stereo,mobile,U dic;with telecontroller and radio Speaker ...