Turn a usb port into a virtual 71 channel sound cardr r add speakerheadphone and mic to almost any usb system without having to install driversr built in volume and mute controls and virtual 71 audio output for windowsr backed by a startechcom 2 year warranty and free lifetime technical supportr r turn a usb port into a virtual 71 channel sound card this usb to audio adapter lets you connect headphones or speakers and a microphone to your computer without the need to unplug other devices