Features: Compact, portable, convenient to carry. The USB Virtual 7.1 Channel Sound Adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems, 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 operaiton systems. Plug and play. Easy to use. LED indicators: Microphone-Mute Status, Activity USB2.0 Full-Speed ( 12Mbps ) Specification USB HID Cla Specification 1.1 USB Audio Device Cla 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 Size: 56 x 25 x 18mm Package: 1 x USB 2.0 3D Virtual 7.1 Channel Audio Sound Card