The Arduino-compatible Pro Micro is similar to the Pro Mini except it uses an ATmega32U4 rather than an ATmega328 microcontroller on board.
Arduino Micro Pro ATMEGA32U4 5V/16MHZ
Nano V3.0 ATmega328 CH340G 5V 16M Micro-controller with Mini USB Cable – Envistia Mall
Leonardo Pro Micro ATmega32U4 5V 16MHz Arduino IDE Compatible - Devobox
Leonardo Pro Micro ATmega32U4 16MHz 5V Replace ATmega328 Arduino Pro Mini USA
DEVMO 2PCS Pro Micro ATmega32U4 5V 16MHz Micro-USB Development Module Board with 2 Row pin Header Compatible ard-uino Leonardo Replace ATmega328 Pro Mini : Electronics
★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
2PCS Pro Micro ATmega32U4 5V 16MHz Micro-USB Development Module Board with 2 Row pin Header Compatible ard-uino Leonardo Replace ATmega328 Pro Mini
ATmega32U4 running at 5V/16MHz Supported by IDE v1.0.1 Rx and Tx Hardware Serial Connection 4 x 10-bit ADC pins, 12 x Digital I/Os On-Board Type-C
AITRIP 2PCS Pro Micro ATmega32U4 5V 16MHz Type-C Development Module Board with 2 Row pin Header Compatible arduino Leonardo Replace ATmega328 Pro Mini
ATTINY88 Micro Development Board ATMEGA328 16Mhz – Envistia Mall
Arduino Nano Micro-Controller with ATmega328P 16MHz 5.0V CH340G USB – Envistia Mall