Product features and description:Without installing drivers base on WIN2000， WINXP， WIN7 WIN8 and other system， operating simplistic just plug in headphones or speakers， wonderful music can immediately appreciate the !! compact size， easy to carry.USB2.0 compatible pure digital audio output， the virtual 7.1 channel processing capabilities， just plug， just play.Interface: USBSupport Sound Track: 7.1 channelAudio Support: DirectSound 3D， EAX 3.0， EAX 4.0， Dolby Digital EX， Dolby Digital AC-3， Multi Speaker Surround3D