... ,nice design 4.best quality & competitive price Portable USB Mini Speaker With Replaceble Battery: 1.Stereo sound effect, wonderful bass, sound ... ,good quality with competitive price 2.Plug and play, identify USB automatically, USB Powered and signal directly3.Full-digital processing, no ... you can play music sources from mobile phone ,MP3,MP4,PC and other audio devices. 6.Variouse color are available ...