Wemos D1 Mini ESP8266 - IoT Board

11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0) 1 analog input(3.2V max input) a Micro USB connection Compatible with Arduino Compatible with nodemcu Microcontroller ESP-8266EX Operating Voltage 3.3V Digital I/O Pins 11 Analog Input Pins 1(Max input: 3.2V) Clock Speed 80MHz/160MHz Flash 4M bytes Length 34.2mm Width 25.6mm Weight 10g