LDR Light Sensor: On-board light detection
WS2812 LED: Integrated RGB LED
USB-to-UART Programmer: Includes CH340G for easy programming
LDR Connection: LDR connected to ESP’s ADC pin for light sensing
3 Operating Modes: AP, STA, AP+STA
Compact Dimensions: 24mm x 16mm
Micro USB Connection: For power and programming

Power input: 4.5V ~ 9V (10VMAX)
USB-powered: Transfer rate: 110-460800bps
Support UART / GPIO: Data communication interface
Smart Link: Smart Networking
Wide Temperature Range: -40°C ~ + 125°C
Dual High-Power H-Bridge
4MByte Flash
Low-Cost Wi-Fi
A Beginner's Guide to the ESP8266