Bose QuietComfort Ultra Headphones (2nd Gen) / Google Pixel Buds 2a

Bose QuietComfort Ultra Headphones (2nd Gen): QCUH2-HEADPHONEARN · second-generation over-ear Ultra

Google Pixel Buds 2a: Pixel Buds 2a in-ear earbuds with a USB-C charging case; the Fog, Berry, Iris and Hazel colours share the same hardware. The Pixel Buds A-Series and Pixel Buds Pro 2 are separate models.

SpecificationBose QuietComfort Ultra Headphones (2nd Gen)Google Pixel Buds 2a
Release year20252025
LaunchAnnounced 10 September 2025; available from 2 October 2025 Bose—
Noise controlActive noise cancellation; Quiet and ambient-sound Aware modes Bose—
WirelessBluetooth 5.4; multipoint connection to two devices

Bose quotes a 30 ft (about 9 m) range. On Snapdragon Sound sources, Gaming Mode uses aptX Adaptive.

Bose		—
Digital audioUSB-C; 24-bit / 48 kHz lossless audio support

The product page’s current FAQ says 16-bit, 44.1/48 kHz for USB audio; manufacturer sources disagree on bit depth.

Bose		—
Analog audio2.5 mm headphone input; included 3.5 mm–2.5 mm cable; headphones must be powered on Bose—
BatteryUp to 30 hours with ANC on and immersive audio off; 23 hours with immersive audio; 45 hours with both off

Manufacturer test figures; volume, settings and use affect runtime.

Bose		ANC on: 7 hours (20 hours with case); ANC off: 10 hours (27 hours with case); 5 minutes of charging gives 1 hour Google
ChargingUSB-C; up to 3 hours for a full charge; 15 minutes for up to 3 hours with ANC on Bose—
ControlsPower/Bluetooth and multifunction buttons; touch volume strip; wear detection Bose—
Weight and sizeHeadphones about 264 g; 4.5 × 16.0 × 20.5 cm

Manufacturer figures are 0.583 lb and 1.772 × 6.299 × 8.071 in; metric values are converted.

Bose		—
In the boxCarry case; 3.5–2.5 mm audio cable; 1 m USB-C to USB-C cable

No charging adapter in the box.

Bose		—
ModesQuiet, Aware, Immersion, Cinema; EQ and shortcuts in the Bose app Bose—
Water resistanceNo IP rating; avoid situations where the headphones may get wet Bose—
PC calls8.2.20 and later: two-way PC audio over USB-C; app compatibility varies Bose—
Software 10.12.128 September 2026: LE Audio beta on compatible Android/Windows devices and improved USB calls Bose—
Type—In-ear true wireless; wing-tip stabiliser, four ear-tip sizes (XS, S, M, L) Google
Processor—Google Tensor A1 in each earbud Google
Driver—11 mm dynamic driver Google
Noise cancelling—Active noise cancellation (Silent Seal 1.5); transparency mode; active in-ear pressure relief

Pressure relief adjusts pressure in the ear canal to reduce the blocked feeling of a sealed in-ear design.

Google
Connectivity—Bluetooth 5.4; pairs with Bluetooth 4.0+ devices

Full features need an Android 6.0+ phone and a Google account; on iPhone basic listening works but app settings are unavailable.

Google
Calls—Two microphones per earbud; Bluetooth super wideband; Clear Calling; wind-blocking mesh

Super wideband carries a wider audio range on calls with compatible Pixel phones.

Google
Charging case—USB-C charging; no wireless charging listed Google
Durability—Earbuds IP54, case IPX4

IP54 protects against dust and splashing water; the earbuds are not designed to be submerged.

Google
Sensors—Capacitive touch controls; IR proximity sensor for in-ear detection; Hall sensor in the case Google
Size and weight—Earbud 23.1 × 16.0 × 17.8 mm, 4.7 g; case 50.0 × 24.5 × 57.2 mm, 47.6 g with earbuds Google
Updates—Automatic security updates for at least three years from first availability on the US Google Store Google
Colours—Fog, Berry, Iris, Hazel Google