7.1 CH Channel USB Sound Card Mic Speaker 3D External Sound Cards Adapter for Desktop/Laptops Dimensions:  57 x 25 x 12mm Weight: 12g LED indicators: Microphone-Mute Status Activity USB2.0 Full-Speed ( 12Mbps ) Specification USB HID Class Specification 1.1 USB Audio Device Class Specification 1.0. USB bus-powered no external power required. This is USB 2.0 External 7.1-Channel Audio Sound Card Adapter. It can work with either desktop or laptop. And with the Xear 3D Sound Simulation software it extends your stereo speaker or earphone to 7.1 channel environment  Connectors: USB Type A Stereo output jack mono microphone input jack Xear 3D virtual 7.1 channel sound simulation software for Windows XP / Vista is included Functions keys: Microphone-Mute Speaker-Mute Volume-Up and Volume-Down Plug and Play. No drivers required for Windows 2000 / XP / Server 2003 / Vista/7/8/10 Linux Mac Os