Headset POLY Voyager 5200 UC Bluetooth: A2DP, echo cancellation, proprietary DSP, six layers of WindSmart technology, PC and mobile wideband up to 6,800 Hz, up to nine days of standby time, up to seven hours, Up to 98 feet (30 meters), Office, Bluetooth 5.0 with A2DP, HFP, HSP, PBAP, and SSP2 profiles Call: mute, redial, answer/ignore/end, volume +/- Media: 20 g/.04 lbs, pause/play, track forward/track back, Avaya, Cisco, Microsoft, and other softphones and UC applications are supported. One-year warranty