Mini SS Micro ATMEGA32U4 Module Board Compatible For Arduino Pro Micro - AliExpress
Beetle Virtual Keyboard BadUSB Pro Micro ATMEGA32U4 Module Mini Development Expansion Board For Arduino Leonardo R3 DC 5V I2C (WHL #37) – Wan Hung Lo Electronics
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LTRIG Custom 1PCS Mini USB ATmega32U4 Pro Micro 5V 16MHz Board Module For Arduino/Leonardo ATMega 32U4 - AliExpress
Micro ATmega32u4 5V 16MHZ Microcontroller Expansion Board Module Compatible For Arduino Mirco Replace Pro Mini Pro Micro - AliExpress
ATmega32U4 Pro Micro Controller Board for Arduino Pro Micro 5V Replace ATmega328
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Pro Micro Micro-USB Development Module Board Voltage Regulator ATmega32U4 5V/16MHz Microcontroller Board for Arduino IDE V1.0.1 - AliExpress
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Type-C MINI USB Pro Micro For Arduino ATmega32U4 5V/16MHz Module With 2 Row Pin Header For Leonardo Usb Interface Board - AliExpress
Pro Micro Micro-USB Type-C Board for Arduino IDE V1.0.1 ATmega32U4 5V/16MHz Development Module Board with 2 Row Pin Header - AliExpress