The USA Virtual 8.1 channel sound Adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems. Bundled with Xear 3D Sound simulation software, it turns your stereo speaker or earphones into 8.1 channel environment. No drivers required, just plug and play for instant audio playback, also compatible with all major operation systems. Features: 1. Multi-channel technology, strongly 8.1 channel dynamic sound. 2. Headphone amplifier for computer enhance bass and high pitch 3. Work as an audio source output 4. Compliant with USB 2.0 Full-speed(12Mbps) specification 5. Compliant with USB Audio Device Class Specification 1.0 6. Compliant with USB HID Class Specification 1.1 7. USB bus-powered mode ,no external power required 8. Connectors: USB type-A, Stereo output jack. Mono microphone -input jack 9. Functional keys: Microphone-Mute, speaker -Mute, Volume-Up, Volume-Down, former-song, next-song and stop/start 10. Include Xear 3D , the virtual 8.1 channel Sound simulation software for Windows XP/Vista/7 11. No driver required for Windows XP/Vista/7 12. Color: Black, White Package included: 1x USB External 8.1 Channel Sound Card