Jabra Evolve 20 SE, USB C/A, UC Mono Headset, Plug-and-play, Noise-cancelling, Clearer Conversation, Manage Calls Easily, Leatherette Ear CushionsEvolve 20 Professional headset with easy call management and great sound for calls and music Get more productive 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. We call this passive noise