The Pro Micro board is a microcontroller board based on ATmega32U4
This Pro Micro board is equipped with 20 digital input/output pins out of which 7 can be used as PWM outputs and 12 as analog inputs/
It has Atmega 32u4 Running At 5v/16mhz Supported Under UNO Ide V1.0.1 On-Board Micro-Usb Connector For Programming
This 5V 16MHz Pro Micro board contains everything a microcontroller needs. You can directly connect it to yur computer and get started with uno based projects.