Brand and high quality. Compliant with USB 2.0 full-speed (12Mbps) specification Compliant with USB audio device class specification 1.0 Compliant with USB HID class specification 1.1 USB bus-powered mode, no external power required LED indicators: microphone-Mute states, activity Include xear 3D, the virtual 7.1 channel sound effect Driverless-No driver required for windows 98SE/ME/2000/XP/Server 2003/Vista/Windows7.Linux,Macos Compliant with USB 2.0 full-speed (12Mbps) specification Compliant with USB audio device class specification 1.0 Compliant with USB HID class specification 1.1 Include xear 3D, the virtual 7.1 channel sound effect Driverless-No driver required for windows 98SE/ME/2000/XP/Server 2003/Vista/Windows7.Linux,Macos Brand No Brand SKU OT776EL1FMXDGNAFAMZ-152791