USB 2.0 Full-Speed (12Mbps), USB audio device compliant USB Bus powered, no external power needed ... Description:1)USB 2.0 Full-Speed (12Mbps), USB audio device compliant 2)USB Bus powered, no external power needed ... 6)Include Xear 3D, the virtual 7.1 channel sound simulation software for Windows XP/Vista 7)Driver not required ... Weight: 15g Size: 58x25x13mm 7.1 Channel USB 3D Virtual Audio Sound Card