Compliant with USB 2.0 full-speed (12Mbps) - Compliant with USB audio device class specification 1.0 - Compliant with USB HID class specification 1.0 - 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 7.1 channel sound simulation software for Windows XP/Vista - Driverless. No driver needed for Windows 98SE/ME/2000/XP/Server 2003/Vista Linux Mac OS10