The USB Virtual 7.1 Channel Sound Adapter is a highly flexible audio interface which can be used either with Desktop or Notebook/Laptop systems; it turns your stereo speaker or earphones into 7.1 channel environment, giving you high quality sound enjoyment. Features Plug and play,automatic installation USB bus-power, no external power supply needed Stereo audio out and mono microphone socket With microphone-mute, speaker-mute, volume up and down four function keys Xear 3D driven for verious 3D soud simulation Turn your stereo speaker or earphones into 7.1 channel environment Two jacks, the green one is for stereo output, and the yellow one is for mono microphone input Specifications: USB 2.0 Full-speed (480Mbps) specification USB HID cla specification 1.1 USB Audio device cla specification 1.0 USB Type A, stereo output jack, mono microphone input jack connectors Supports: Windows 98se /ME / 2000 / XP / Server 2003 / Vista/Windows 7 and Windows 8 Linux/ MacOS 10/ System Requirement : Desktop or notebook PC with a USB port, Stereo active speakers or stereo earphone