Package:NoChannels:7 Type:External Model Number:Audio Sound Card Adapter Interface Type:USB Origin:Mainland China Certification:CE Features : 1.Size: Approx 57 x 25 x 12mm 2.Weight: 12g 3.LED indicators: Microphone-Mute Status, Activity 4.USB2.0 Full-Speed ( 12Mbps ) Specification 5.USB HID Class Specification 1.1 6.USB Audio Device Class Specification 1.0. USB bus-powered, no external power required. 7.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, giving you high quality sound enjoyment. 8.Connectors: USB Type A, Stereo output jack, mono microphone input jack 9.Xear 3D virtual 7.1 channel sound simulation software for Windows XP / Vista is included 10.Functions keys: Microphone-Mute, Speaker-Mute, Volume-Up and Volume-Down 11.Plug and Play. No drivers required for Windows 2000 / XP / Server 2003 / Vista, Linux, Mac Os Package Included: 1 x usb sound card. Note : this product comes without retail boxes,We put in a safe packaging