- WiFi Module – AI Thinker ESP-12F module with Espressif ESP8266 WiSoC
- Connectivity – WiFi 802.11 b/g/n
- 2x 8-pin headers with GPIOs, ADC (Connected to Photocell), UART, VCC, 3.3V, GND, and Reset.
- USB – 1x micro USB port for power
- Misc – Photo resistor, RGB LED, micro switch button for firmware upgrade (connected to GPIO 4)
- Dimensions – 3 x 2.5 cm