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Specifications | Earbuds | Bose QuietComfort Ultra Earbuds (2nd Gen)
bose-quietcomfort-ultra-earbuds-(2nd-gen)
Bose QuietComfort Ultra Earbuds (2nd Gen)Sold from 2025

Specifications | Earbuds | Bose QuietComfort Ultra Earbuds (2nd Gen)

Product or App

Product Specifications

Physical Specifications

Weight

One earbud: 0.017 lb (0.01 kg)

Case: 0.132 lb (0.06 kg)

Dimensions

One earbud: 1.18" H x 0.49" W x 0.98" D (2.99 cm H x 1.25 cm W x 2.49 cm)

Case: 2.61" H x 2.35" W x 1.06" D (6.63 cm H x 5.97 cm W x 2.69 cm D)

Material

Earbuds: Plastic, gold-plated charging contacts, metal

Eartips: Silicone

Case: Hard plastic

Water Resistance

Earbuds: Yes, IPX4

Case: No

Microphone4 microphones in each earbud

Power Specification

USB Charger Requirements

USB-C, 5V DC, 1.2A

Battery Charging Temperature Range

41 to 104 °F (5 to 40 °C)

Battery Life

Immersive Audio Off: 6 hours

Immersive Audio On: 4 hours

Case with 100% charge: 18 hours

Charge Time

Earbuds: 2 hours

Case: 3 hours

Quick-charge time: 20 minute change provides up to 2 hours of use

Bluetooth Specification

Bluetooth VersionBluetooth 5.3
Bluetooth CodecSBC, AAC, aptX Adaptive 1 (including low latency)
A2DP Bluetooth Audio Streaming
HFP Bluetooth
Snapdragon Sound
BLE 2
Bluetooth RangeUp to 30 feet (9 m)

1AptX Adaptive will "adapt" the audio quality seamlessly and continuously based on the strength back to the source’s device to maintain a good wireless connection and avoid audio dropouts. This means that for a great wireless connection, you can get the highest possible audio quality up to and including "lossless" audio. The normal sampling rate applicable in your Bose QuietComfort Ultra Earbuds (2nd Gen) is 44.1kHz and will adapt up to 48.1kHz when “high resolution” listening.  The codec also has a low latency mode, aka "Gaming Mode.” Just as with audio quality, the codec will "adapt" to achieve the best (lowest) latency possible given the current wireless conditions.

2While QuietComfort Ultra Earbuds (2nd Gen) use Bluetooth Low Energy to communicate with the Bose App and perform other signal and control tasks, they do not receive content over LE Audio.
App Specifications

Bose App

Supported Languages

Uses the selected language of the iOS or Android device running the app

Compatible Operating Systems

iOS 16 or newer

Android 11 or newer

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Specifications | Earbuds | Bose QuietComfort Ultra Earbuds (2nd Gen)