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Amazon.com: Pro Micro ATmega32U4 5V 16MHz USB Type C Development Module Board with 2 Row pin Header Compatible arduino Leonardo Replace ATmega328 Pro Mini… : Electronics
HiLetgo 3pcs Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller
Amazon.com: AITRIP 5 Pack PRO Mini Atmega328P-AU 5V/16MHz Development Board Microcontroller Bootloadered with Pin Headers for Arduino (5pcs) : Electronics
Amazon.com: AITRIP Pro Micro ATmega32U4 5V/16MHz Module Board with 2 Row pin Header Compatible with arduino Leonardo Replace ATmega328 Pro Mini (1 PCS) : Electronics