Powerful bass surging vigorous,alto plump and soft. Provides you a more enjoyable stereo sound experience, enjoy musics, movies and games with the stereo surround sound system. Concise and vogue design makes the USB speaker more compact and smart. The color of Green black makes it ultra elegance and fashion. The outer volume control button allows you to easily adjust the size of sound. USB Powered, no adapter or amplifier required. Plug and use, no driver needed.