Features:

Sweat and Water Resistant

Bluetooth® 5.0

Spatial vent for in-ear pressure reduction and spatial awareness

Dual beamforming microphones / Voice detecting accelerometer

Up to 5 hours of listening time and up to 2.5 hours of talk time

Capacitive touch sensors / Dual IR proximity sensors

What is in the box:

Buds Carrying / Charging Case

USB 'C' Cable

Ear bud rubber tips for different sizes of ears

User's Manual

Open the Google Pixel Buds Charging / Carrier case to locate the Buds

Once the Google Pixel Buds have been removed, and we can get a closer look at the Buds.

Back View of the Buds

Spatial Vent

Connectors for Charging the Battery when in the carrier / charging case

IR Detector for detecting when the buds are in the charging case or in the ear

IR Detector for detecting when the bud is in the ear

Grounded Metal Grid sound chamber cover

Closeup view of the Grounded Metal Grid

Microphone port. One on each side, and opposite one another.

Spatial vent / grounded mesh

IR Detector for in ear detection

Since the Google Pixel Buds are made of plastic and are glued together, the only way in was to cut into the Google Pixel Bud. This is a destructive teardown

Once in, we are able to get our first look at the Google Pixel Bud's electronics. The stack up the Google Pixel Bud is as follows:

Touch Sensor

Main Circuit board

Battery

Speaker

Microphones

Charging and in Ear IR Detectors (not shown)

View of the electronics when removed from the Google Pixel Bud Enclosure

Flex PCB based Touch Sensor

Main PCB. Contains MCU, Bluetooth Radio, Audio Processing, Power Management, and Sensors

Battery

MEMS Microphones

Speaker Coil, Speaker Magnet, and Speak Diaphragm.

Grounded metal grid sound channel cover

IR Detector for in ear detections

Closeup view of the Touch Sensor Flex PCB

Closeup view of the bottom side of the Main PCB

DSP Group - DS18B - Audio DSP

Maxim Audio Amplifier - most likely MAX98502

ST Micro - STM32L431RC6 - MCU

Unknown component. Labelled "ix6". Please leave a comment if you happen to know this component

Programming Interface and test points. Looks to be the standard ARM 20 Pin connector layout.

Bluetooth Antenna. Runs around the outside of the Main PCB - Top and Bottom

Closeup view of some of the components on the bottom side of the Main PCB

DSP Group - DS18B - Audio DSP

ST Micro - STM32L431RC6 MCU

Maxim Audio Amplifier - most likely MAX98502

Closeup view of the top side of the Main PCB

TI - BQ25150 - Battery Charge and Power Management

BES Technic - BES 2300 - Bluetooth Radio

Unknown Device - +7048/A5A59AB - May be the Accelerometer and Gyroscope used for voice detection. Please leave a comment if you know this device

Unknown Device - T 9 51 - Could be Flash Memory or RAM. Please leave a comment if you know this device

Unknown Device - SR 009 - Could be Flash Memory or RAM. Please leave a comment if you know this deviceNew line.

Closeup view some the components on the top side of the Main PCB

BES Technic - BES 2300 - Bluetooth Radio

TI - BQ25150 - Battery Charge and Power Management

Unknown Device - +7048/A5A59AB - May be the Accelerometer and Gyroscope for voice detection. Please leave a comment if you know this device

Closeup view of the speaker Diaphragm

Speaker Coil with Speaker magnet removed

Speaker is ported to increase bass. Port area wraps around the outside of the speaker

MEMS Microphone

Could not cross reference the Microphone Part Number, but it appears to be a Goertek Part. Please leave a comment if you happen to know this component

Closeup view of the IR Detectors. Could not cross reference part numbers to a manufacture. Please leave a comment if you happen to know this component

IR Detectors are used to detect when the Bud is in the ear or in the charger

Closeup view of the Battery

Varta, CP1240 A3, Li-Ion 3.7V, 0.2Wh

Closeup view of the magnet that to holds the Bud in the charger. The magnet located is below the speaker in the sound chamber area

Teardown Exploded View of the Google Pixel Buds 2

Before and After