Poly Voyager 4310-M Microsoft Teams Certified USB-C Headset + BT700 dongle + Charging Stand (77Y97AA) - Connectivity: Bluetooth 5.1, BT700 USB Type-C/USB-A Bluetooth Adapter, Wireless Range: Up to 50m, Speaker size: 32mm, Number of Microphones: 2, Microphone Type: Noise Cancelling, Charge Time: <1.6 hours, Battery Type: Rechargeable Li-ion, Button User Controls: Power on/off, Call Answer/End, Mute, Volume +/-, Pairing