SODIAL(R) USB 2.0 Virtual 2.1 Channel Audio effect 7.1 3D Sound Card Adapter This Great plug-and-play that allow virtual sound quality 7.1 and 3D sound (AC3), optimal for applications such as MSN or Skype. Compatible with USB 2.0 Full Speed (12 Mbps) specification Compatible with USB Audio Device Class Specification 1.0