The front side of the motherboard:

STMicroelectronics F051K86 Entry-level ARM Cortex-M0 MCU with 64 Kbytes Flash, 48 MHz CPU, Motor Control and CEC Functions

Nordic Semiconductor NRF8001 Single-Chip Bluetooth Low Energy Connectivity IC

e160 317a

There are a few additional components on the board:

Imaging sensor

Four LEDs: one on the front side and a row of three on the back side

Fullriver 3.7 V lithium battery