Review on OSOYOO Pro Micro ATmega32U4 Module Board: 5V/16MHz, 2 Row Pin Header, Arduino Compatible – Upgraded Version with ATmega328 Pro Mini Support by Antonio Parson

This is a completely worthless clone of Sparkfun Pro Micro. On Windows 10, this board was recognized as an Arduino Leonardo (it uses the same MPU), but the Arduino IDE failed to load the sketch. After installing the Sparkfun AVR support package and setting the Arduino IDE to point to Sparkfun Pro Micro, the board was completely locked. I suspect that this board's assembly is faulty or doesn't use the original AT chip (ATmega32U4). Don't waste your money on this and buy an Arduino Leonardo instead, or buy a device manufactured and sold by sparkfun. This thing isn't even heavy enough to be a paperweight, so it's completely useless.