Now with the headphone dissembled, we can turn our attention to looking at the components that make up the headphone. We will start with the MCU PCB

AIROHA AB1565M - ARM Cortex M4/Bluetooth 5.2 Dual Mode with Active Noise Cancellation

MEMS Microphone. Not able to cross the part. The part has the following markings: 2C4 1X7. If you happen to know the part, please the part information in the comments

Crystal Oscillator

MEMS Microphone. Not able to cross the part. The part has the following markings: 6C2 1D7. If you happen to know the part, please leave the part information in the comments

Battery Management IC. Part Markings 651DE1M0 13Q0W52C

Could not cross the part. The part has the following markings: SV4CP 2H0. If you happen to know the part, please leave the part information in the comments