Obsessively engineered with Bose's best noise cancellation for headphones and spatialised audio for immersive listening, the QuietComfort Ultra Headphones (2^nd Gen) make every note expand, every beat hit harder and every melody take up more space. Bose Immersive Audio takes what you're hearing out of your head and places it in front of you for a more natural listening experience. CustomTune technology personalises your audio by analysing your ear's shape and adapting the sound so everything you listen to hits exactly as it should. With up to 30 hours of battery life (up to 23 hours with Immersive Audio)* and unrivalled comfort from luxe materials, the headphones let you sink deeper into your favourite songs and sounds. The earcups gently hug your ears and the headband evenly distributes pressure, while sleek, polished metal arms add a stylish touch. Easily connect to devices with Bluetooth Core 5.4 and keep track of what you have paired in the Bose app.