Arduino Micro

Embeds the ATmega32u4 processor running at 16 MHz Has native USB communication Compact 48x18mm size for easy integration into your projects Has 20

Buy Arduino Pro Micro Clone 5V 16MHz at affordable prices - ®

The Micro is a microcontroller board based on the ATmega32U4 (datasheet), developed in conjunction with Adafruit. It has 20 digital input/output pins

Arduino Micro

Arduino Pro Micro (Clone) - ElectroPeak

Using 24 inputs of an Arduino Micro? - Microcontrollers - Arduino Forum

12 digital I/O, 5 with PWM and 9 analog inputs in a tiny package.

Pro Micro 5V / 16MHz

Cytron Arduino Pro Micro Compatible w/ Pre-soldered Headers - RobotShop

Arduino Pro-Micro – PrismaKBD

PRO Micro Atmega32u4 5V / 16MHz Mini MCU Leonardo Board for Arduino - China PRO Micro, Atmega

A000093, Arduino Microcontroller board, Micro w/o headers

Squee! It's the cutest, tiniest little Arduino yet! The Arduino Micro packs all of the power of the Arduino Leonardo in a 1.9 x 0.7 (48mm x 18mm)

Arduino Micro without Headers - 5V 16MHz ATmega32u4 - Assembled