QuietComfort Ultra Earbuds are the ultimate earbud experience. Breakthrough spatialized audio for more immersive listening makes your music feel realer than ever before — no matter the content or source. Bose Immersive Audio takes what you’re 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 analyzing your ear’s 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 favs playing as long as you want to listen (up to 4 hours with Immersive Audio). Power up your earbuds with the Bose Wireless Charging Case Cover. It combines the power of wireless charging with a silicone case that protects your Bose earbuds from potential scratches or outside marring. Plus, it features a convenient carabiner to secure it when you’re on the go. Upgrade your QuietComfort Ultra Earbuds and QuietComfort Earbuds II with the Bose Wireless Charging Case Cover for wireless charging and protection.