Installation Method: External 4. Reinforced USB Interface 5. Independent Control Buttons 6. Dual Headset And Dual Microphone Excuse Features: 1.Use This Adapter To Add Virtual 7.1 Channel Surround Sound To Your Computer 2.Plug And Play And Easy To Use 3.Requires Windows 98se, Me, Xp, Vista, 7, Server 2003, Server 2008; Linux. Must Use Usb 2.0 Port 4.Plug And Play, No Driver Required 5.Works With Desktop, Laptop, Windows Or Linux 6.Function Volume Increase/Decrease, Microphone Mute, Earphone Mute 7.Requires Usb 2.0 Port 8.Stereo Output Jack, Mono Microphone Input Jack