Compliant with USB2.0 Full-Speed (12Mbps) Specification Compliant with USB Audio Device Class Specification 1.0 Compliant with USB HID Class Specification 1.1 USB bus-powered mode, no external power required Connectors: USB Type-A, Stereo output jack, Mono microphone-input jack Functional keys: Microphone-Mute, Speaker-Mute, Volume-Up, Volume-Down LED Indicators: Microphone-Mute Status, Activity Include Xear 3D, the virtual 7.1 channel sound simulation software for Windows XP/Vista Driveless - No driver required for Windows 98SE/ME/2000/XP/Server2003/Vista/Linux/MacOS