Certified for Microsoft Skype for Business, Zoom Meeting. Also compatible with other UC applications such as Avaya, Cisco, Skype and others. Up to 160 ft/50m range from supported smartphone or laptop with optional BT700 Bluetooth adapter (less with other Bluetooth devices). Dual flexible microphone boom arm with noise canceling. Bluetooth v5.2. Battery up to 24 hours talk time (47 hours of listening time), 50 days standby time. 2 microphones: 1 uni-directional; 1 MEMS-directional. Call Controls: Track forward/track back/pause/play, mute, answer. On-line busy indicator (two LED lights on speaker housing). Travel case/pouch included. USB-A. 2-year warranty. Sold by each.