USB 2.0 7.1 Channel 3D Virtual Audio Sound CardThe USB Virtual 7.1 Channel sound adapter is a highly flexible audio interface which can be used dither with Desktop or Notebook systems. Bundled with Xear 3D sound simulation , it turns your stereo speaker or earphones into 7.1 channel envment. No drivers required, just plug and play for instant audio playback, also compatible with all major operation systems * Features & specification 1) Complaint with USB 2.0Full-speed (12Mbps) Specification 2) Complaint with USB Audio Device Class specification 1.0 3) Complaint with USB HID Class specification 1.1 4) USB bus-powered mode, no external power required 5) Connectors: USB Type-A, stereo output jack, Mono microphone-input jack 6) Functional keys: Microphone-Mute, speaker- Mute, Volume-Up, Volume-Down 7) LED indicators: Microphone- Mute Status, Activity 8) Include Xear 3D, the virtual 7.1 channel simulation for Windows XP/Vista 9) Driverless-No driver required for Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux, OS * System requirement 1) Desktop or notebook PC with a USB port 2) Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux, OS 10 or higher 3) Xear 3D (Virtual 7.1 channel sound simulation ) for Windows XP/Vista 4) Stereo active speaker or stereo earphone 5) Mono microphone ( Optional )