USB 2.0 Full-Speed (12Mbps), USB audio device compliant USB Bus powered, no external power needed Connectors : USB Type-A, Stereo output jack, Microphone-input jack Functional keys : Microphone - Mute, Speaker - Mute, Volumn up and Volumn Down LED Indicator : green for Power and red for Microphone-mute USB interface allows you to easily add sound to any notebook or desktop computer Include Xear 3D, the virtual 7.1 channel sound simulation software 7.1 Channel Sound Adapter supports Windows 98SE/ME/2000/XP/Vista, Linux, Mas OS Transform analog Sound Signals to Digital