Arduino Pro Micro ATmega32U4-MU 5V/16MHz Module with Micro USB

Arduino Micro Pro ATMEGA32U4 5V/16MHZ

PRO MICRO/TYPE-C USB 5V 16MHz Board Module For Arduino/Leonardo ATMEGA32U4- MU Controller Pro-Micro Replace Pro Mini - AliExpress

Products

ATmega32U4 Pro Micro Controller Board for Arduino Pro Micro 5V Replace – eElectronicParts

5pcs ATmega32U4 Pro Micro Controller Board for Arduino Pro Micro USB 5 – eElectronicParts

Arduino Micro Pro ATMEGA32U4 5V/16MHZ

Keyestudio PRO MICRO 5V 16MHZ ATMEGA32U4-MU Development Board For Arduino

Arduino Micro — Arduino Online Shop

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

ATMega 32U4 running at 5V/16MHz Supported under Ard-uino IDE v1.0.1 On-Board micro-USB connector for programming 4 x 10-bit ADC pins 12 x Digital I/Os

Pro Micro ATmega32U4 5V 16MHz Micro-USB Development Module Board with 2 Row pin Header Compatible ard-uino Leonardo Replace ATmega328 Pro Mini

SparkFun 12640 Pro Micro - 5V/16MHz