Audio Quality: Crystal clear audio quality with latest DECT compression and modulation techniques without impacting user density. Stereo wearing style and noise canceling microphone Ultra-Secure: Exceeds enterprise security expectations - designed to meet the highest level DECT Security Step C enhanced with military-grade FIPS 140-2 listed features, such as 256-bit AES encryption Microsoft Teams certified version: Provide a seamless Microsoft Teams experience with easy meeting starts and notification access. Meets Microsoft Teams Open Office specification Wireless Freedom: Freedom to move with a line-of-sight wireless range of up to 580ft/180m and up to 13 hours of talk time Compatibility: Optimized for a wide range of Poly desk phones and compatible with over 800 desk phones across the industry. Future proof your headset with call control support for new softphones and the ability to manage multiple softphones with Poly Hub