Mini version Node MCU board is developed by doit company, which is made by double pcb. This board encapsulated by the newest 4M Flash ESP8266-12F module. So it is more stable & more better performance. Each board from doit company is tested. Feature: Use the full new (not old) Ch 340 chip Novel design for the more stable USB (Universal Serial Bus) Each board is strictly tested Compatible with Arduino: https://github.com/esp 8266/ Arduino Compatible with Node MCU: www.nodemcu.com Package included: 1 x mini Node MCU board 2 x 8pins row needles 2 x 8pins row females