The USB Virtual 7.1 Channel Sound Adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems. Bundled with Xear 3D Sound simulation software, it turns your stereo speaker or earphones into 7.1 Channle environment. No Drivers required, just plug and play. Specification: - Full-speed USB 2.0 12Mbps - No external power required - No drivers required