QuietComfort Ultra Headphones take everything music makes you feel to new highs. It starts with world-class noise cancellation thats quieter than its predecessors. Then breakthrough spatialised audio makes your music feel more immersive than ever before. Bose Immersive Audio takes what youre hearing out of your head and places it in front of you for the most natural listening experience no matter the content or source. And CustomTune technology upgrades your sound even more by analysing your ear shape and adapting the audio performance accordingly so everything you listen to hits exactly as it should. Keep the session going with up to 24 hours of battery life (up to 18 hours with Immersive Audio) and unrivalled comfort from luxe materials. The earcups wrap your ears in a soft hug while the headband spreads pressure evenly. And sleek metal arms add a statement of sophisticated design. Connect to your devices with advanced Bluetooth 5.3 and keep track of what you have paired in the Bose Music app. It also allows quick and easy set-up, gives you access to Adjustable EQ settings, and more.