The Jabra Evolve 20 Mono is a professional headset with easy call management and great sound for calls and music, Great sound for calls and music, Call control unit for managing calls, Plug-and-play connectivity | Easy call management - Get easy access to the most used functions, such as volume and mute. You can also answer and end calls directly from the control unit | Passive Noise Cancellation - Simply wear the headset to eliminate high-frequency noise, such as human voices - all thanks to the specially designed ear cushions. Jabra calls this 'passive noise cancellation' | Ultimate noise cancellation microphone - State-of-the-art, noise-cancelling microphone eliminates background noise. The ear cushions are designed to reduce high-frequency sounds. You and your conversation partner won't struggle to hear each other | Plug-and-play setup - The headset works out of the box with all leading systems. Installation is as easy as simply plugging it in | The Jabra Evolve 20 has Passive Noise Cancellation. Simply wear the headset to eliminate high-frequency noise, such as human voices - all thanks to the specially designed ear cushions | Compatible with your platform, All Jabra USB headsets and speakerphones work with all the most popular online voice call services | Jabra products work out of the box and allow you to combine perfect sound quality with great comfort