Outstanding Audio Quality: 65mm speaker to maximize coverage of sound, ultra-wideband calling technology ensures thatevery detail is conveyed clearly, making conversations more vivid and realistic. Crystal-Clear Conference Calls: Yealink's self-developed AI noise reduction algorithm effectively eliminates ambient noise, filtering out over 1,000 sounds (such as keyboard taps or AC hum), ensuring accurate speech reproduction. 16.4ft Radius: With six microphones and advanced 360° sound pickup technology, it ensures high-quality sound capture from any angle or position, making it ideal for 8-12 person conference rooms. Natural Conversation: Premium duplex communication technology allows any party in a meeting to speak at the same time at time, and every word can be clearly transmitted. Daisy Chain Expansion: Connect one device to your PC as the Host via USB cable. Then, simply press the cascade button on both units to establish a stable wireless link between them. Effortlessly double your audio coverage from 20 m² to 40 m². Connectivity Options: Bluetooth 5.3 (30m range), USB-C cable, includes USB-A adapter. Seamlessly pair smartphones, laptops, and computers. NOTE: This version does not include the BT51C dongle. Microsoft Teams Certified: Compatible with Zoom, Google Meet, Cisco Webex, and other UC platforms. Runs seamlessly on Windows, macOS, Android. Liquid Crystal Dispaly: Makes the user experience more intuitive andconvenient, allowing you to understand the connection status and working status of the speaker at any time, has mute button, bringing a whole new communication experience. Virtual Bass Technology: Deeply enhances the audio texture, immersing you in rich and compelling low frequencies, delivering a powerful audio experience. 26-Hours Battery Life: Built-in rechargeable battery supports up to 26 hours of calls or 35 hours music per charge — enough for all-day meetings. Fully recharges in 2.5 hours with 5V/2A source. Standby time to 1 week.