To pair your headphones, turn them on and slide the Power/Bluetooth switch to the Bluetooth icon until the status light flashes blue. Open your device's Bluetooth settings, selectQuietComfort Ultra Headphonesfrom the list of available devices, and confirm the connection. Once paired, the headphones will automatically reconnect to your device whenever Bluetooth is enabled.

CustomTune technology is a proprietary Bose technology that optimizes the audio playback you hear based on the unique physical properties of your ear and ear canal. It works by playing a specially designed calibration tone as the welcome chime each time you power on the headphones while wearing them. It then measures how the shape of your ear uniquely modifies that sound. The headphones use that information to adjust their sound to your ears, creating a more balanced, authentic audio experience.

The QuietComfort Ultra Headphones (2nd Gen) feature intuitive physical buttons and touch controls. Easily adjust the volume, play or pause music, skip tracks, answer calls, switch listening modes, and activate your voice assistant all without reaching for your phone.

TriPort acoustic architecture enhances airflow within the earcups, allowing the headphones to deliver deeper bass, richer detail, and a more natural sound without increasing their size. The result is powerful, balanced audio with impressive clarity across all frequencies.

Wind Block is a setting you can use when your environment is windy. Wind Block mutes the microphones on the outside of the earcups used for noise cancellation so that gusts of wind do not cause system responses that become noise disturbances in themselves. Note that the exterior microphones used for voice pickup are not muted, so if you’re on a call, the person on the other end will still hear the wind.

Aware Mode turns on the external microphones of QuietComfort Headphones and feeds ambient sounds into the headphones, enabling awareness of the sounds in the environment, such as cars and emergency vehicles, while still enjoying audio content.

Bose QuietComfort Headphones Ultra have a range of up to 30 ft (9 meters) from the source device. This range may be reduced by physical obstructions, such as walls and doors, or by interference from other electronic devices. Pops or a cracking noise may be heard if there’s interference with the Bluetooth connection. If that happens, move away from wireless routers or microwaves and bring your headphones closer to the Bluetooth device.

Charge your QuietComfort Ultra Headphones (2nd Gen) using the included USB-C charging cable. Connect the USB-C cable to the charging port on the left earcup and plug the other end into a USB power source.

A full charge takes up to 3 hours and provides up to 30 hours of battery life with noise cancellation turned on and Immersive Audio turned off. With both noise cancellation and Immersive Audio enabled, battery life lasts up to 23 hours.

For a quick boost, a 15-minute charge provides up to 2.5 hours of playback with noise cancellation enabled and Immersive Audio turned off.

The battery level can be checked through the app or by using the built-in voice prompts when powering on the headphones.

The QuietComfort Ultra Headphones (2nd Gen) provide up to 30 hours of battery life on a full charge with noise cancellation turned on and Immersive Audio turned off.

When using Immersive Audio, battery life lasts up to 23 hours. Battery performance may vary depending on volume level, audio source, Bluetooth connection, and settings.

For a quick recharge, 15 minutes of charging provides up to 2.5 hours of playback, so you can quickly get back to enjoying your music, calls, or entertainment.

Yes. If the battery of your QuietComfort Ultra Headphones (2nd Gen) runs out, you can continue listening by connecting the headphones to your device using an audio cable.

When using a wired connection, you can still enjoy your music without battery power. However, features that require battery power, such as Active Noise Cancellation, Bluetooth connectivity, and Immersive Audio, will not be available when the headphones are completely powered off.

Yes. You can customize the sound of your QuietComfort Ultra Headphones (2nd Gen) using the app.

The built-in equalizer allows you to adjust the bass, mid-range, and treble levels to match your personal listening preferences. You can create your own sound profile and enjoy your music exactly the way you like it.

The app also includes audio settings that let you manage features such as Immersive Audio, noise cancellation modes, and other listening preferences for a more personalized experience.

The back of the right earcup on the QuietComfort Ultra Headphones (2nd Gen) features the main control button and touch control area.

The multi-function button allows you to:

• Turn the headphones on and off.
• Play and pause music.
• Answer and end phone calls.
• Skip tracks or control playback functions.

The capacitive touch strip allows you to adjust the volume by swiping up or down with your finger for quick and easy control.

You can also use the app to customize certain controls and manage your listening experience.

The back of the left earcup on the QuietComfort Ultra Headphones (2nd Gen) includes the shortcut button, which gives you quick access to your preferred listening features.

By default, the shortcut button allows you to switch between different noise cancellation modes, such as Quiet Mode and Aware Mode.

You can customize the shortcut button in the app to access other functions, including Immersive Audio or your preferred audio settings, making it easier to control your headphones without reaching for your phone.

Spotify Tap is a feature that gives you quick and easy access to your Spotify music without needing to open the app on your phone.

With QuietComfort Ultra Headphones (2nd Gen), you can use the shortcut button to instantly resume listening to your recently played music or receive personalized recommendations from Spotify based on your listening habits.

Spotify Tap works through the app and requires a compatible device with the Spotify app installed and logged in.