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 miniphone 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 FullSpeed (12Mbps) Specification USB HID Class Specification 1.1 USB Audio Device Class Specification 1.0 USB buspowered, no external power required. Technical Specification 100 percent New 7.1 Channel External USB Audio Sound Card Adapter USB2.0 FullSpeed Specification Connectors: USB Type A, Stereo output jack, mono miniphone input jack USB buspowered, no external power required LED indicators: miniphoneMute Status, Activity No drivers required for Windows 98SE or ME or 2000 or XP or 7 or Server 2003 or Vista, Linux, MacOS Dimensions: 2.25" x 1.0" x 0.50" Package include:1X External Sound Card Audio Adapter Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 13cm.