The Bose QuietComfort Ultra Headphones represent the pinnacle of Bose's noise-cancelling technology, combining world-class ANC with immersive spatial audio that places sound all around you for a concert-hall listening experience. CustomTune technology automatically adjusts both noise cancellation and sound performance to the unique shape of your ear canal each time you put them on. With up to 24 hours of battery life, multi-point Bluetooth for simultaneous connection to two devices, and the lightest weight of any premium Bose headphone, they're designed for the most demanding listeners. A flagship product that sets the standard in premium wireless audio.