Bose QuietComfort Ultra Earbuds Diamond 60th Edi.

Improving on the award-winning QuietComfort Earbuds II, the diamond 60th edition Bose QuietComfort Ultra Earbuds True Wireless In-Ear Headphones continue to offer high-quality audio, world-class noise cancellation, CustomTune technology that auto-adjusts the noise cancellation and sound performance to your ears' liking, responsive touch controls, and a water- and sweat resistant IPX4 rating—and now immersive audio to take audio performance to an entirely new level.
And with new features like Snapdragon Sound for robust low-latency Bluetooth connectivity, Qualcomm aptX Adaptive codec for achieving the highest-possible audio quality, Google Fast Pair to expedite the initial pairing process, and a new metallic finish, the QuietComfort Ultra Earbuds make listening to music a deeply personal experience.

When the earbuds are placed in your ear, a chime is played. The microphone inside the earbud measures the sound in your ear canal and adjusts it to create a perfectly balanced sound for you.
CustomTune technology compensates for the differences in individual ears, as many people's left and right ears are not identical in shape, size, and condition. The result is truly personalized sound balance.
CustomTune also helps by personalizing noise cancellation to the shape of your ears. This may soften unwanted sounds that are hardest to reduce, like voices.

Bose Immersive Audio goes beyond special effects. It creates a wider, more spacious soundstage, so your content becomes multidimensional and layered, regardless of the audio platform or device. It brings you closer to your music than ever by virtually seating you right in the acoustic sweet spot. Bose Immersive Audio reveals its true depth, spatializing what you’re hearing by virtually placing it in front of you. This effect is enabled by an onboard IMU and proprietary Bose digital signal-processing software in the QuietComfort Ultra Earbuds.
There are two options for listening to Bose Immersive Audio: Still is best when you’re not moving because the audio stays in place—perfect for when you’re sitting down and want to feel as if the sound is fixed in a specific position. Motion allows the audio to move with you, so it’s always out in front of you—great for staying immersed on the go.