Usb audio device class specification 1.0. Usb bus-powered, no external power required.
This is usb 2.0 external 7.1-channel audio sound card adapter. It can work with either desktop or laptop. It extends your stereo speaker or earphone to 7.1 channel environment, giving you high quality sound enjoyment.
Connectors: usb type a, stereo output jack, mono microphone input jack
functions keys: microphone-mute, speaker-mute, volume-up and volume-down
plug and play. No drivers required for windows 2000 / xp / server 2003 / vista, linux, mac os
compact, portable, convenient to carry