usb speaker for computer laptop mobile mp3 1.OEM & ODM welcome 2.ABS plastic housing 3.CE ROHS certificate usb speaker for computer laptop mobile mp3,ABS plastic housingFunction1.Crystal-clear sound effects and surprisingly deep bass2.USB transmission,high efficiency, high performance 3.ABS plastic housing4.Support for laptop, desktop, MP3, MP4, tape recorders, learning machines, radios and other ...