Description: This is D1 mini, it is a mini WIFI board based on ESP-8266. 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire. 1 analog input(3.3V max input). Specification: Material: electronic components Size: approx. 3.4 x 2.5cm/1.7 x 1inch Package Includes: 1 Piece Esp8266 Wifi Development Board
