Arduino Pro Micro has an integrated USB-Serial converter due to its smaller size than Arduino Nano and the use of ATmega32U4 on it, which allows it to be used in more compact projects.
Thanks to the Atmega32U4 on the Arduino Pro Micro, it can be programmed with a direct USB connection from the computer, but the drivers must be installed in the Windows operating system. There is no need for this process for Windows 10, but a driver is required for operating systems other than Windows 10, you can find the driver links and the necessary details in the documents section.
Arduino Pro Micro Clone 5V 16MHz Features
Microcontroller: ATmega32U4
Working Voltage: 5 V
Total I / O Pins: 18 (Most pins can be used for different operations)