The 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 software, it turns your stereo speaker or earphones into 7.1 channel environment. No drivers required, just plug and play for instant audio playback, also compatible with all major operation systems* Features & specification1) Complaint with USB 2.0Full-speed (12Mbps) Specification2) Complaint with USB Audio Device Cl specification 1.03) Complaint with USB HID Cl specification 1.14) USB bus-powered mode, no external power required5) Connectors: USB Type-A, stereo output jack, Mono microphone-input jack6) Functional keys: Microphone-Mute, speaker- Mute, Volume-Up, Volume-Dow7) LED indicators: Microphone- Mute Status, Activity8) Include Xear 3D, the virtual 7.1 channel simulation software for Windows XP/Vista9) Driverless-No driver required for Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux, Mac OS* System requirement1) Desktop or notebook PC with a USB port2) Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux, Mac OS 10 or higher3) Xear 3D (Virtual 7.1 channel sound simulation software) for Windows XP/Vista4) Stereo active speaker or stereo earphone 5) Mono microphone ( Optional )