ITEM NAME:NodeMcu Lua WIFI ESP8266 ESP-12E Internet Development Board Module Wireless Descriptio n Description: Open-source, interactive, programmable, low cost, simple, smart, Wi-Fi supported Arduino-like hardware IO Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware Manipulate the hardware Similar to arduino code, but interactively in Lua script Event-driven API for network applications, which facilitates developers writing code running on a 5mm*5mm sized MCU in Nodejs style Greatly speed up your IOT application developing process Specifications: Material: PCB board Color: Black Size: 6cm x 3cm x 1cm Package Included: 1 x ESP8266 CH340G Serial WiFi Module Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. NodeMcu Lua WIFI ESP8266 ESP-12E Internet Development Board Module Wireless.Similar to arduino code, but interactively in Lua script. Greatly speed up your IOT application developing process. Specifications:Material: PCB board. Arduino-like hardware IO. Manipulate the hardware.