Features Ideal for connecting headset with computer through this USB Sound Adapter to enjoy sound effect. Delivers good audio quality. Double microphone and headset ports. Control volume, turn on/off microphone and sound without going to your computer. LED indicators let you know if it is in mute, mic or activity mode. Compliant with USB 1.0, USB1.1, and USB 2.0. USB bus-powered mode, no external power required. Connectors: USB Type-A, Stereo output jack, Microphone-input jack. Functions keys: Microphone-Mute, Headset-Mute, Volume-Up and Volume-Down. Driverless when used with following OS: windows98SE/ ME/ 2000/ XP/ Server2003/ Linux / Mac OS.