The USB Virtual 7.1 Channel Sound Adapter is a highlyflexible audio interface which can be used either with Desktop or Notebook systems. Bundled with Xear 3D Sound simulation software, it turns your stereo speaker or earphones into 7.1 channel environment. No drivers required, just plug and play for instant audio playback, also compatible with all major operation systems. Features & Specifications Compatible with USB 2.0 Full-Speed ( 12Mbps ) Specification Compatible with USB Audio Device Class Specification 1.0 Compatible with USB HID Class Specification 1.1 USB bus-powered mode, no external power required. Connectors : USB type-A, Stereo output jack, mono microphone-input jack Functional Keys : microphone-mute, Speaker-Mute, Sound up-down LED indicators : Microphone-Mute Status, Activity Include Xera 3D, the virtual 7.1 channel sound simulation software for windows XP/Vista Driverless System requirement Desktop or notebook PC with a USB port Windows 98/SE/ME/2000/XP/Server 2003/Vista,Linux,MacOS 10 or higher Xear 3D Mono microphone. 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).