... your stereo speaker or earphones into 7.1 channel environment. No drivers required, just plug and play for instant audio playback, also ... Class Specification 1.1 D.USB bus - powered mode, no external power required E.Connectors: USB Type-A, Stereo output jack, Mono ... channel sound simulation software for Windows XP/ Vista I.Driverless - No driver required for Windows 98 SE / ME / 2000 / XP / Server ...