The Arduino Micro is a microcontroller board based on the ATmega32u4, developed in conjunction with Adafruit. It contains everything needed to support the microcontroller, simply connect it to a computer with a micro USB cable to get started. It has a form factor that enables it to be easily placed on a breadboard. Specifications: -Microcontroller: ATmega32u4 -Operating Voltage: 5V -Input Voltage (recommended): 7-12V -Input Voltage (limits): 6-20V -Digital I/O Pins: 20 -PWM Channels: 7 -Analog Input Channels: 12 -DC Current per I/O Pin: 40 mA -DC Current for 3.3V Pin: 50 mA -Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by bootloader -SRAM: 2.5 KB (ATmega32u4) -EEPROM: 1 KB (ATmega32u4) -Clock Speed: 16 MHz