This is D1 mini, it is a mini WIFI board based on ESP-8266EX.

11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire

supported(except D0)

1 analog input(3.3V max input)

a Micro USB connection

How to get started in for Arduino:     Setup driver Before you use miniD1 boards, you need setup CH340g driver.     Python On Windows you need install Python 2.7.10. On Linux & OSX, you don't need install it, comes preinstalled with OS.     Installing Hardware package There is two ways to install hardware package, Boards Manager or GIT     Installing with Boards Manager Starting with 1.6.4, for Arduino allows installation of third-party platform packages using Boards Manager. We have packages available for Windows, OS, and Linux (32 and 64 bit). <1>. Install for Arduino 1.6.7 from the for Arduino website. <2>. Start for Arduino and open Preferences window into Additional Boards Manager URLs field. You can add multiple URLs, separating them with commas. <4>. Open Tools→Board:xxx→Boards Manager and install esp8266 by ESP8266 Community (and don't forget to select your ESP8266 board from Tools > Board menu after installation).    Installing with GIT (Recommend): We recommend using GIT to install Hardware package, you can always get the latest version of it.

Packge Included

1x    ESP8266 ESP-12 ESP12 FOR WeMos D1 Mini WIFI Development Board With Pins