Features:     For hardware IO.       Nodejs style API Network.     Network applications driven by events.       Open source, interactive, programmable, low cost, intelligent, support for WI-FI.    Interactively in Lua script.       That makes it easier for developers to write code running on an MCU of 5mm x 5mm in size.       Accelerate greatly the development process of your IOT application.       The advanced interface for IO hardware, which can dramatically reduce redundant work to configure and manipulate hardware.      Specification:  Size: 5.8 x 3 x 1 cm / 2.28 x 1.18 x 0.40 inch (appr.)    Package List:  1 x Wireless Internet Wifi Module Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.