... usb for notebook/PC/laptop 1.mini,portable 2.OEM & ODM orders welcome, 3.With CE ROHS certificate mini speaker,usb port,laptop ... speakers selling point1.Crystal-clear sound effects and surprisingly deep bass;2.Plug and play, identify USB automatically, USB ... driver and amplifer circuit needed, easy to operate6.Support for laptop, desktop, MP3, MP4, tape recorders, learning machines, ...