This is a low cost A’board-compatible ESP8266 development board. A 0.96″” OLED display is on the board. It is very easy for beginners. You can program it like A’board. There is a project support for ESP8266 chip to the A’board environment: A’board core for ESP8266 WiFi chip. Another famous project is NodeMCU, which you can use LUA to control ESP8266.

All ESP8266 pins broken out
12 digital pins write/read/interrupt/pwm/I2C/one-wire supported(except D0)
1 analog input
Integrated 0.96 Prime; OLED
Micro USB connection
Compatible with A’board
Compatible with NodeMCU(Lua for ESP8266)
Input Power 4.75V ~ 12V
Size: 6.2×2.7cm/2.44×1.06inch
Quantity: 1 Set