This External 7.1 USB Sound Card Optical Audio Adapter with Cable is perfect for you to enjoy high quality sound and robust USB audio experience. Plug-and-play under Windows without external memory，our audio adaptercan be connected to a host computer through a single USB connection to deliver impressive external audio capability that can instantly be swapped between systems， without having to open the computer case for installation. It provides a cost-saving upgrade that turns desktop or laptop sound into a home theater-ready audio feast. A regretless choice to bring you a long-lasting and dependable sound solution!                                    Features            New and high qualityPlug-and-play under windows without external memoryCan be connected to a host computer through a single USB connectionEasy to use， no need to open the computer case for installationBring you a long-lasting and dependable sound solutionHigh speed USB interface offers a high quality solution for upgrading desktop or laptop soundProvide a cost-saving upgrade that turns desktop or laptop sound into a home theater-ready audio feastCompatible with Windows 98SE， ME， 2000， XP， Mac OS 9.1 (Mac version has 2-channel playback only)Not apply to Win 7 OS                                                             Specifications            Interface    Compliant With USB Audio Device Class v1.0    <br>Color    Blue    <br>Weight    3.77oz/107g    <br>Compatible with    Windows 98SE，ME，2000，XP，Mac OS 9.1(Mac Version Has 2 Channel Playback Only)    <br>Mode    Optical Fiber Input and Output Channels: 7.1    <br>Dimensions    (8.27 x 6.30 x 3.15)" / (21 x 16 x 8)cm (L x W x H)    <br>Condition    New    <br>                                                            Package Includes            1 x External 7.1 USB Sound Card Optical Audio Adapter+CableWin 7 is not compatible                                                            Extra Info            Note: Win 7 is not compatible