Arduino Pro Micro with Pins out for USB - Project Guidance - Arduino Forum
ATmega32U4 Pro Micro Controller for Arduino Micro USB 5V 16MHz Replace ATmega328 – ASA College: Florida
Arduino Pro Micro — KeyHive
Type-C MINI USB Pro Micro For Arduino ATmega32U4 5V/16MHz 3.3V/8Mhz Module With 2 Row Pin Header Leonardo Usb Interface Board - AliExpress
Amazon.com: RedTagCanada Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Board Microcontroller Compatible to Arduino Pro Micro Serial Connection wPin Header (1, Pro Micro ATmega32U4 Micro-USB) : Electronics
Clever PCB Brings Micro USB To The Arduino Uno | Hackaday
Mini USB ATmega32U4 Pro Micro 5V 16MHz Board Module For Arduino/Leonardo ATMega 32U4 Controller Pro-Micro Replace Pro Mini
Amazon.com: SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3.3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input : Electronics
Type-C MINI USB Pro Micro For Arduino ATmega32U4 5V/16MHz 3.3V/8Mhz Module With 2 Row Pin Header Leonardo Usb Interface Board - AliExpress