USB 2.0 External 7.1 Channel Sound Card 3.5mm Stereo Headphone Adapter Laptop PC Product Feature 100% Brand New and High Quality. No drivers required, just plug and play for instant audio playback. Add a virtual 7.1 channel sound to your PC or laptop. Turn your stereo speaker or earphones into 7.1 channel environment. USB 2.0 Full-speed (12Mbps) specification. USB Audio device class specification 1.0. USB HID class specification 1.1. USB bus-power mode, no external power required. Two jacks, the green one is for stereo output, and the yellow one is for mono microphone input. Requirements: Desktop or notebook PC with a USB port, Stereo active speakers or stereo earphone. Product Specification Type：External Sound Card Virtual：7.1 Supports system：Windows 98SE /ME/ 2000/ XP/Server 2003/Vista/ Linux/ Mac OS 10 or higher(window7/8/10) Length：28.5cm Color：Black，White Package Included 1 x External Sound Card