The USB virtual 7.1 channel sound adapter is a highly flexible audio inter face which can be used either with desktop or notebook systems.no drivers required, just plug and play for instant audio playback. Features: 1.complaint with USB2.0 full -speed (12 mbps) specification.2. compliant with USB

The USB virtual 7.1 channel sound adapter is a highly flexible audio inter face which can be used either with desktop or notebook systems.no drivers required, just plug and play for instant audio playback. Features: 1.complaint with USB2.0 full -speed (12 mbps) specification.2. compliant with USB audio device class specification1.0. 3. compliant with USB hid class specification1.1. 4. USB bus - powered mode. No external power required. 5. connectors : USB type - a, stereo output jack, mono microphone- input jack. 6. Plug & Play, No need Driver Installation for all windows version and Mac OS. 7. free switch between headphone and speaker. 8. Functions keys: microphone-mute, speaker-mute, volume-up and volume-down. Package: 1 x USB sound card adapter.