Nodemcu ESP8266 Wifi 0.96 Inch OLED Board development board integrates the ESP8266 0.96 Inch OLED having a resolution of 128×64. OLED is a self light-emitting technology composed of a thin, multi-layered organic film placed between an anode and cathode the next generation of flat-panel displays. Features: ESP8266 0.96″ OLED All ESP8266 pins broken out Compatible with Arduino & NodeMCU Micro USB connection Specifications: OLED resolution: 128×64 12 digital pins 1 analog input Input Power is 5V Application: This product is very useful for small projects because there is no need to do a connection between esp8266 and OLED.