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QuietComfort Ultra Earbuds are the ultimate earbud experience. Breakthrough spatialised audio for more immersive listening that makes your music feel realer than ever before no matter the content or source. Bose Immersive Audio takes what youre hearing out of your head and places it in front of you for the most natural listening. And CustomTune technology takes it to another level by analysing your ear shape and adapting the sound and world-class noise cancellation so everything hits just as it should. The comfort is shaped to you too. You get nine combinations of eartip and stability band sizes to find the best fit. And up to 6 hours of play time keeps your faves playing as long as you want to listen up to 4 hours with Immersive Audio*. Plus the included case holds up to three additional charges. Connect to your devices with advanced Bluetooth 5.3 and keep track of what you have paired in the Bose Music app. It also walks you through set-up and lets you customise a shortcut and access Adjustable EQ settings.