Premium, Personalized Audio CustomTune tech adapts the sound to the shape of your ears for the best audio performance for you. World-Class Noise Cancellation Choose Quiet Mode for our best in-ear noise cancelling, or Aware Mode to let in your surroundings. All-Day Comfortable Fit Soft silicone eartips and stability bands give you a snug, comfortable fit that won’t quit all day long. Listen Uninterrupted Multipoint connectivity lets you pair to multiple devices at once and switch between them effortlessly. Now Charge Wirelessly Power up with the wireless charging case and listen for up to 6 hours of play time (up to 4 with Immersive Audio).¹ The case itself holds up to three full charges.² Customize with the Bose App Get to the music quicker with step-by-step setup and make the earbuds totally yours with customizable EQ and shortcuts. ¹ Testing conducted by Bose in February 2025 using production-representative Bose QuietComfort Ultra Earbuds and a variety of music tracks using A2DP Bluetooth audio streaming at RSSI signal strength of 75dBm. Volume set to playback loudness of 75dB, 3-band EQ set, to zero in Quiet Mode (full noise cancellation). With Immersive Audio off, playback time was up to 6 hours before battery depletion. With Immersive Audio on, playback time was up to 4 hours before battery depletion. Battery life varies based on settings and usage. ² Testing conducted by Bose in February 2025 by inserting production-representative Bose QuietComfort Ultra Earbuds with battery depleted (to the point of no audio playback) into a fully charged Bose QuietComfort Ultra Earbuds charging case and charging earbuds to 100%, then resuming audio playback until battery depletion. Testing resulted in three (3) complete charging cycles by the case before a full charge was no longer possible.