Pro Micro ATmega32U4 Features:
1. ATmega32U4 running at 5V/16MHz
2. On-Board Type-C USB connector for programming
3. 4 x 10-bit ADC pins, 12 x Digital I/Os(5 are PWM capable)
4. Rx and Tx Hardware Serial Connections
5. Recommend power supply for board: 6-7V, less than 9V

How to use?
1. Connected to computer. (If this module cannot be recognized by your computer, please refer to this link to install the driver)
2. Opened Ard IDE and loaded Blink sketch.
3. Set board to Leonardo and selected the appropriate COM port (It showed up in the list already identified as a Leonardo).
4. Connected an LED to pin 9 and modified the sketch accordingly.
5. Hit upload and within a few seconds having a blinking LED.

Package Includes:
3* Pro Micro ATmega32U4 5V 16MHz Module Board Micro/Type-C USB