Extended wear with comfort: On ear Bluetooth headphones engineered with a headset strap design that distributes weight evenly for better comfort Microphone for open offices: 2 noise-cancelling mics with AI algorithms suppress nearby talker noise, ensuring clear audio on this Microsoft Teams certified wireless headset with microphone Certified for business: Certified for Microsoft Teams, this wireless Bluetooth headset also meets Microsoft Teams Premium Microphone for Open Office requirements Wireless freedom: Pair up to 2 devices via Bluetooth or USB receiver with 50 m range(2); up to 20 hrs talk time, 25 hrs listening time (ANC on) on this wireless headset with mic(3) Adaptive Hybrid ANC: Dynamically adjusts the noise-cancellation level on this noise cancelling headset in real time, so you can stay focused in all the places you work(1) Stay connected to your audio: Smart enumeration keeps the office headset, receiver, and meeting platform in sync, so there’s never any question about whether the headset is connected Custom-designed driver: Our noise cancelling headphones' 40 mm driver is expertly engineered to offer enhanced ANC and bass performance, while providing flexibility for precise sound tuning Replaceable parts, longer life: Headphones wireless, easily swap earpads and headset strap with no tools needed(4); a replaceable battery with an optimised charging option(5) extends battery lifespan