You will really appreciate the crystal clear sound & voice quality. The noise-canceling microphone screens out the noise around you so you will be heard as well as you can hear. The multi-function button allows you to answer / end calls on the headset or you can dock / undock the headset from the base station. Volume control & microphone mute can be adjusted on the headset. You can have conference calls with up to four headsets. Headset Type: Monaural; Headset Style: Over The Head; Earpiece Type: Ear Cushion; Earpiece Material: Leatherette.