Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4

Spice up your DIY keyboard builds with this little microcontroller, which works with the TMK and QMK firmware. It's got 18 pins for you to work with.

ATmega32U4 running at 5V/16MHz Supported by IDE v1.0.1 Rx and Tx Hardware Serial Connection 4 x 10-bit ADC pins, 12 x Digital I/Os On-Board Type-C

AITRIP 2PCS Pro Micro ATmega32U4 5V 16MHz Type-C Development Module Board with 2 Row pin Header Compatible arduino Leonardo Replace ATmega328 Pro Mini

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

Arduino Micro Pro ATMEGA32U4 5V/16MHZ

Pro Micro ATmega32U4 5V 16MHz Replaces ATmega328 Pro Mini Arduino-Compatible

Arduino Micro — Arduino Official Store

Mini USB ATmega32U4 Pro Micro 5V/16MHz Board Module For Leonardo ATMega 32U4 Controller Pro-Micro Replace Pro Mini For Arduino - Price history & Review, AliExpress Seller - AITEXM Store

Pro Micro Module with ATmega32U4, 5V, 16MHz, Arduino compatible

10pcs ATmega32U4 Pro Micro Controller Board for Arduino Pro Micro USB – eElectronicParts

OSOYOO Pro Micro Board ATmega32U4 Leonardo 5V/16MHz Module Board Type

Micro/Mini/Type-C ATmega32U4 5V 16MHz 2-row needle for Arduino Pro Mini

Arduino Pro Micro 5V/16MHz Type-C Robotics Bangladesh

Supported by Arduino IDE V1.0.1. Micro USB/ Type-C interface programming (optional). Pin header X2.

Pro Micro ATmega32U4 Board 5V 16MHz Compatible with Arduino Pro Micro ATmega32U4