1. USB 2.0 full speed (480 Mbps) specification 2. Conforms to the best-in-class 1.0 USB audio device specification 3. USB bus-powered mode, no external power supply required 4. Connectors: USB Type A socket, 3.5 stereo output socket 5. Function keys: play , play pause, volume up, volume down, previous song, song 6. Include xear 3D, virtual 7.1 channel sound simulation software under 7. There is no need to install the driver in the following operating Windows98 / SE / / 2000 / XP / Server 2003 / Vista, for Linux / for MacOS. Colour:black Material:aluminum Package Contents: 1 x USB External Sound Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.