Up to 37 hours battery life Great for flexibility in noisy offices Bluetooth, up to 30m Connect to up to 2 devices Built to last 2 year warranty Digital hybrid Active Noise-Cancellation 10 microphone technology Over-ear wearing style Fast charge Hear yourself think.We set out to create instant quiet, anywhere. The result is a world-class professional headset with cutting-edge digital hybrid Active Noise Cancellation (ANC), powered by our most advanced digital chipset ever, and designed for incredible noise isolation; just put it on for instant immersion in your thoughts.Its time to change the game. Welcome to the new standard.Dont hide when youre in your stride.Weve taken our busylight to a whole new level, making it visible from any direction. The red light is automatically activated when youre on a call or in a meeting, or you can activate it yourself at the touch of a button. So, even when youre right in the middle of everything, your busylight will protect you from all angles