External USB Audio Sound Card Adapter USB 2.0

External usb audio sound card adapter usb 2.0external usb audio sound card adapter usb 2.0 100% & high quality support ordinary speakers or headphones with a microphone hole. multi-channel technology, have dynamic 7.1-channel sound. 1.led indicators: microphone-mute status, activity 3.usb2.0 full-speed ( 12mbps ) specification 4.usb class specification 1.1 5.usb audio device class specification 1.0. usb bus-powered, no external power required. 6.the usb 2.0 external 7.1-channel audio sound card adapter. it can work with either desktop or laptop. and with the xear 3d sound simulation 7.software, it extends stereo speaker or earphone to 7.1 channel environment, giving high-quality sound enjoyment. 8.connectors: usb type-a, stereo output jack, mono microphone input jack 9.xear 3d virtual 7.1 channel sound simulation software for windows xp / vista is included 10.function keys: microphone-mute, speaker-mute, volume-up, and volume-down weight:0.05kg color: black package including: 1 x usb s