1) USB 2.0 7.1 Channel External Audio Sound Card Adapter.
2) Complies with USB 2.0 Full Speed (12 Mbps) specification.
3) Complies with USB Audio Device Class Specification 1.0.
4) Compliant with USB HID 1.1 class specification
5) Driver Free: No driver required for Windows 98SE/ME/2000/XP/7/Server 2003/Vista/Linux Mac OS.
6) Extend your stereo speaker or headphones to a 7.1 channel environment.
7) LED indicators: activity microphone mute status
8) It is powered directly through the USB port. Work with desktop or laptop computers.
9) Compact portable convenient to carry.
10) Device Type: USB 2.0 7.1 Channel External Audio Sound Card Adapter
11) Interface type: USB 2.0
12) Function keys: Microphone-Mute Speaker-Mute Volume up Volume down