We bust out our microscope to get a look at these tiny chip markings:

Apple 343500130 is suspected to be the W1 wireless communication chip

Cypress CY8C4146FN programmable system on a chip

Maxim MAX98730EWJ low power stereo audio codec

Texas Instruments TPS62743 300 mA DC-DC buck converters

Bosch Sensortec BMA282 accelerometer

STMicroelectronics accelerometer/gyroscope

Likely some sort of serial flash memory