This 7.1 USB sound cards offers a high quality solution for upgrading desktop or laptop sound. Home Theater-Ready Audio Solution Providing a robust USB audio experience, the external sound card for your laptop or PC connects to a host computer through a single USB 2.0 connection, to deliver impressive external audio capability that can instantly be swapped between systems, without having to open the computer case for installation. Cost-Saving Solution Supporting analog and digital audio for 2 to 7.1 channel audio applications, the SPDIF output sound card provides a cost-saving upgrade from built-in/on-board sound that turns desktop/laptop sound into a home theater-ready audio solution. The audio to USB adapter features easy-to-use volume control and two external microphone inputs, for applications requiring high quality sound with multi-input capability with support for 44.1 KHz and 48 KHz sampling rates for analog playback and recording or 48 KHz for SPDIF. Easy Setup A more than suitable solution for home theater, gaming or multi-media presentations, the External USB Sound Card is easy to install with plug and play support in Windows XP and Windows Vista operating systems. The USB stereo audio adapter is backed by our 2-year warranty and free lifetime technical support. Note: The audio adapter's SPDIF optical pass-through port supports two-channel audio, this port does not support 5.1 or 7.1 audio.