The Pro Micro is similar to the Pro Mini, except for the fact that it utilises the ATMega32U4. Additionally, there is an on-board USB transceiver inside the 32U4, which removes
12 digital I/O, 5 with PWM and 9 analog inputs in a tiny package.
Pro Micro 5V / 16MHz
Exploring the Top 3 Arduino-Compatible Boards: Uno R3, UNO SMD, and Pro Micro, by biggelectronics
American Raspberry Pi Shop. One stop shop for all your Pi needs. Raspberry Pi add-ons, HATs, accessories, Starter Kit, Media Center kit, RetroPi
Pro Micro Compatible Board - 5V/16MHz
Arduino Micro Pro ATMEGA32U4 5V/16MHZ
Pro Micro RP2040 Clone by Tweety's Wild Thinking
Pro Micro 5V/16MHz Arduino Compatible Atmega32U4 Breakout
Pro Micro ATmega32U4 5V 16MHz Replace ATmega328 For arduino Pro Mini With 2 Row Pin Header For Leonardo Mini Usb Interface 1PCS
Ryan Ma's PD Micro Offers USB Power Delivery to 20V in an Arduino Pro Micro- Compatible Board
Leonardo R3 Development Board Pro Micro ATmega32U4 Module Compatible for Arduino – diymore