The USB 2.1Channel (Virtual 7.1) sound adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems. Bundled with Xear 3D sound simulation software, it turns your stereo speaker or earphones into 2.1 channel environment (Virtual 7.1 effect). * 1xUSB Type-A input * 1x Stereo output jack * 1xMono microphone-input output jack * Driverless-No driver required for windows 98SE/ME/2000/XP/Server 2003/Vista/Windows7.Linux,Macos