Poly Voyager 4220 Office combines top-class acoustic performance with wireless convenience in a professional Bluetooth headset. This model of Voyager 4220 comes with a two-way base that connects to a computer and a desk phone. The headset supports Bluetooth 5.0 to connect to the base, and also to connect to a mobile device, giving you a versatile communications solution. It has an extended Bluetooth range of 300ft line of sight.