Google Pixel Buds 2a / Sony ULT WEAR (WH-ULT900N)

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.

Sony ULT WEAR (WH-ULT900N): WH-ULT900N (printed code YY2981) closed over-ear wireless headphones; Black, Off-White, Forest Gray. ULT FIELD speakers and the WH-1000X series are separate products.

SpecificationGoogle Pixel Buds 2aSony ULT WEAR (WH-ULT900N)
Release year20252024
TypeIn-ear true wireless; wing-tip stabiliser, four ear-tip sizes (XS, S, M, L) Google—
ProcessorGoogle Tensor A1 in each earbud Google—
Driver11 mm dynamic driver Google—
Noise cancellingActive 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		Digital active noise cancelling with Integrated Processor V1 and Dual Noise Sensor; Ambient Sound mode

Two mics on each cup sample outside noise and the processor generates an inverse signal; Ambient Sound mode lets you hear announcements and speech without removing the headphones.

Sony
ConnectivityBluetooth 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		—
CallsTwo 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		—
BatteryANC on: 7 hours (20 hours with case); ANC off: 10 hours (27 hours with case); 5 minutes of charging gives 1 hour GoogleMusic up to 30 hours ANC on, 50 hours off; calls up to 30 hours ANC on, 40 hours off; about 3.5 hours to charge over USB Sony
Charging caseUSB-C charging; no wireless charging listed Google—
DurabilityEarbuds IP54, case IPX4

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

Google		—
SensorsCapacitive touch controls; IR proximity sensor for in-ear detection; Hall sensor in the case Google—
Size and weightEarbud 23.1 × 16.0 × 17.8 mm, 4.7 g; case 50.0 × 24.5 × 57.2 mm, 47.6 g with earbuds Google—
UpdatesAutomatic security updates for at least three years from first availability on the US Google Store Google—
ColoursFog, Berry, Iris, Hazel Google—
Driver and ULT button—40 mm dome-type closed dynamic driver with neodymium magnet; ULT button for bass-heavy sound mode

The ULT button switches to a strong bass setting with one press; the app equaliser can tune the sound further.

Sony
Frequency response—5–20,000 Hz (JEITA, wired); 20–20,000 Hz over Bluetooth (44.1 kHz sampling) Sony
Bluetooth and codecs—Bluetooth 5.2; A2DP, AVRCP, HFP, HSP; SBC, AAC, LDAC; about 10 m range

LDAC carries audio at a higher bitrate from Android devices; iPhones do not support LDAC and use AAC.

Sony
Multipoint and sensor—Two Bluetooth devices at once; wear sensor (pauses music when removed)

You can switch between a phone and a computer without re-pairing.

Sony
Wired use—Detachable single-sided cable of about 1.2 m, gold-plated L-shaped 3.5 mm plug; passive operation supported

When the battery is flat you can keep listening over the cable; audio over USB-C is not listed.

Sony
Microphone and processing—Electret condenser, omnidirectional microphone; DSEE

DSEE tries to restore high frequencies lost in compressed music.

Sony
Impedance and sensitivity—314 Ω on, 32 Ω off (1 kHz); 110 dB/mW on, 100 dB/mW off (wired) Sony
Weight and colours—About 255 g; Black, Off-White, Forest Gray Sony
In the box—Connection cable, USB cable, reference guide, warranty card Sony
Service program—Free repair until 31 January 2027 for cracks in the rotating shaft between headband and housing on specific serial numbers

The serial number is printed inside the left hanger; Sony provides affected ranges and a checker per colour. The crack can cause the housing to detach. Ranges listed in Canada: Black 1000001–1164062, Off-White 2000001–2040144, Forest Gray 3000001–3026514.

Sony