... nice design 4.best quality & competitive price Portable USB Mini Speaker With Replaceble Battery: 1.Stereo sound effect, wonderful bass, ... beyond size,good quality with competitive price 2.Plug and play, identify USB automatically, USB Powered and signal directly3.Full-digital ... desktop, MP3, MP4, tape recorders, learning machines, radios and other audio device 6.Simple & fashion design, easy to ...