Pruduct introduction: One: 5HV2 USB 7.1 Channel External Sound card Game profeional, Two: It is a highly flexible audio interface which can be used wither with desktop or laptop systems. Three: Bundled with Xear 3D Sound simulation software, it turns your stereo speaker or earphones into 7.1 channel environment. Four: No driver required. just plug and play for instant audio palyback, Five: Also compatible with all major operation systems Features&Specification 1 Complaint with usb 2.0 Full-Speed(12Mbps) Specification 2 Complaint with usb audio device cla specification 3 Complaint with usb HI D cla specification 1.1 4 USBbus-powered mode. no external power required 5 Connectors:USB type-A, stereo output jack,morlo microphone input jack 6 Functional keys:Microphone-Mute, Speaker-Mute, Volume-UP,Volume-Down System requirement 1 Desktop or laptop PC with usb port 2 Windows 98SE/ME/2000/XP/Server2003/Vista,Linux,MacOS10 Or higher 3 Xear 3D(vIRTUAL 7.1 channel sound simulation software) for windows XP/Vista 4 Stereoactive speaker or stereo earphone 5 Mono microphone(Optional)