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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 |
| Microphone | 4 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 Version | Bluetooth 5.3 |
| Bluetooth Codec | SBC, AAC, aptX Adaptive 1 (including low latency) A2DP Bluetooth Audio Streaming HFP Bluetooth Snapdragon Sound BLE 2 |
| Bluetooth Range | Up 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 |