Smart, convenient and useful! This USB virtual 7.1 channel external sound card adapter is perfect to connect headphones or speakers, and a microphone to your computer without the need to unplug other devices. The sound adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems. The adapter turns your stereo speaker or earphones into 7.1 channel environment. 100% Brand new and high quality The USB Virtual 7.1 Channel Sound Adapter is a highly flexible audio interface which can be used either with desktop or notebook systems. No drivers required, just plug and play for instant audio playback, also compatible with all major operation systems. Complaint with USB 2.0 Full-speed(12Mbps) specification Compliant with USB Audio Device Class specification 1.0 Complaint with USB HID Class Specification 1.1 USB bus-powered mode, no external power required Connectors: USB Type-A, Stereo output jack, Mono microphone-input jack Function keys: Microphone-Mute, speaker-mute, volume-up, volume-down LED indicators: Microphone-Mute Status, activity Driverless-No driver required for Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux, MacOS P.S.