Add a virtual 7.1 channel sound to your PC and laptop. Extend your stereo speaker or earphone to 7.1 channel environment. LED indicators: Microphone-Mute Status, Activity Powered directly via USB port. Work with either desktop or laptop. Compact, portable, convenient to carry Connectors: USB Type

Add a virtual 7.1 channel sound to your PC and laptop. Extend your stereo speaker or earphone to 7.1 channel environment. LED indicators: Microphone-Mute Status, Activity Powered directly via USB port. Work with either desktop or laptop. Compact, portable, convenient to carry Connectors: USB Type A, Stereo output jack, mono microphone input jack Functions keys: microphone-mute, speaker-mute, volume-up and volume-down Plug and play System Requirement Desktop or notebook PC with a USB port Stereo active speaker or stereo earphone Windows  ME, 2000, Server 2003, XP, Vista, Linux, Mac OS,window 8,window 7 or higher  (Virtual 7.1 channel sound simulation software) Size:4.5 cm x 2.5cm x 1.3cm(approx)