Features: 1.It extends your stereo speaker or earphone to 7.1 channel environment. 2.It giving you high quality sound enjoyment. 3.Complaint with USB 2.0 Full-speed (12Mbps) specification. 4.USB bus-power mode, no external power required. 5.No drivers required, just plug and play for instant audio playback. Descriptions: Compactandportable,convenienttocarry. Twojacks,oneisforstereooutput,theotheroneisformonomicrophoneinput. Ahighlyflexibleaudiointerfacewhichcanbeusedeitherwithdesktopornotebooksystems. Specifications: Length:18.5cm Color:White Virtual:7.1 Connectors:USBtype-A,Stereooutputjack,Monomicrophone-inputjack Supportystems:forWindows98SE/ME/2000/XP/Win7/Server2003/Vista,forLinux,forMacOS PackageIncluded: 1xExternalUSBSoundCard Notes: 1.Duetothedifferencebetweendifferentmonitors,thepicturemaynotreflecttheactualcoloroftheitem.Weguaranteethestyleisthesameahowninthepictures. 2.Duetothemanualmeasurementanddifferentmeasurementmethods,pleaseallow1-3cmdeviation.Thanks!