7.1 channel USB external sound card audio adapter features overview: Plug the sound adapter into your USB port and then plug your headphones into the adapter. 7.1 channel sound without the investment in a whole set of speakers tired of trying to stretch your cables around the back of your computer? Plug this adapter into a USB port on the front and use the headphone jack (for output) or the microphone jack (for input). The USB virtual 7.1 channel sound adapter is a highly flexible audio interface which can be used either with desktop or notebook systems. Comes bundled with xear 3d sound simulation software and turns your stereo speaker or earphones into a 7.1 channel environment usb2.0 full-speed (12mbps) specification USB hid class specification 1.1 USB audio device class specification 1.0 USB bus-powered, no external power required. Technical specification 100% new 7.1 channel external USB audio sound card adapter usb2.0 full-speed specification connectors: USB type a, stereo output jack, mono microphone input jack USB bus-powered, no external power required LED indicators: Microphone-mute status, activity no drivers required for windows 98se / me / 2000 / xp / 7 / server 2003 / vista, Linux, macros dimensions: 2.25" x 1.0" x 0.50".