The top of the lens assembly hosts the motherboard. And chips!

Toshiba TC358870XBG 4K HDMI to MIPI Dual-DSI Converter

Cypress Semiconductor CYUSB3304 USB 3.0 Hub Controller

STMicroelectronics STM32F072VB ARM Cortex-M0 32-bit RISC Core Microcontroller

Winbond W25Q64FVZPIG 64 Mb Serial Flash Memory

Nordic Semiconductor nRF51822 Bluetooth Smart and 2.4GHz proprietary SoC

CMedia CM119BN USB Audio Controller

Bosch Sensortec BMI055 6-axis Inertial Sensor