The Poly Voyager 4210 Office UC headset is a bluetooth wireless monaural (single ear) headset. With a generous roaming range of 91 m (300 ft). Up to 12 hours talk time and 15 hours listen time. Connects directly to your desk phone or mobile phone and/or PC/Mac (via USB adapter). Provides unified communication with platforms like Microsoft Teams, Zoom, GoToMeeting and many others.