The Jabra Evolve 20 MS Duo is a professional headset specifically designed to improve conversations . The headset features Premium noise cancellation technology which enhances call clarity by eliminating background noise. The speakers are built for style and comfort with soft foam ear cushions which is designed to last and reduce office noise. The Evolve 20 MS Duo comes with a control unit which supports comfortable and easy access to most used functions such as volume and mute. It is optimized for Microsoft Lync which provides instant Plug & Play installation for your headset.Evolve 20 MS Duo Features:Stereo Headset Made For Voice & MusicOptimized for MS Lync w/ USB AdapterPassive Noise Canceling Speakers w/ Foam CushionsNoise Canceling MicrophoneIn-Line Call Controls w/ MuteJabra Xpress CompatibleConnects to PC Via USBFully AdjustableOver-The-Head Wearing StyleCertified by Microsoft