ESOUND USB 2.0 Virtual External 7.1 Surround Sound Adapter (USB-AUDD) ESOUND Brand, Only authorized dealer can sell on this product.Don't buy bad quality fakes from unauthorized sellers. If you have brought fakes from other sellers please make A-Z dispute with them and get your money back ASAP. fake products aways broken in short time and no warranty ! USB bus-powered, no external power required.Reverse Compliant with USB Audio Device Class Specification 1.0 Connectors: USB Type-A, Stereo output jack, Mono microphone-input jack. 2 LED indicators. Driverless for Windows 98SE/ME/2000/XP/Server 2003/Vista/7/8/Linux/Mac OSX. Dimension: 1.8" L x 1.0" W x 0.6" H (45 x 25 x 14 mm). Weight: 0.5 oz (14 g)