Bose Ultra Open Earbuds deliver high-quality open-ear sound with Bose OpenAudio technology, letting you enjoy private audio while staying aware of your surroundings. The lightweight, flexible hinge loops behind the ear for a secure, slip-free fit that you can wear for hours. Playtime is up to 7.5 hours (or up to 4.5 hours with Immersive Audio) with up to 48 hours standby; the included charging case adds 19.5 hours and supports wireless charging and a USB-A to USB-C cable. Button controls switch between stereo and Immersive modes, handle calls, and the Bose App offers Auto Volume for consistent playback. Bluetooth 4.0/5.0/5.2 compatible, 0.05 kg, and backed by a 12-month manufacturer warranty.