3PCS Black Pro Micro Board ATmega32U4 5V/16MHz Module Board with 2 Row Pin Header for Arduino Leonardo Black

Only tested one so far but the others appear to be in the same condition as the one I've tested.

Great when they work but out of the three I got only one of them was able to be recognized through USB

I have bought a LOT of Pro Micros and so far this one seems to be the one I like most. It uses the larger AtMega32U4 chip so if you are crafty you can solder directly to the unused pins on the chip with 30AWG wire. Google '40percent.club black pro micro' and you should find a link to a page that explains how to get access to all 25 pins on these.I took two stars off because I hate that Pro Micros don't have physical connections to the PCB for the micro USB jacks. They are just soldered on, that is ALL that is holding them on. I added one star back because this is not KOOKYE's fault, all current Pro Micros suffer from this. Seems odd for something is meant for DIY that it would use such a week connection.I have received other brands that won't go into bootloader mode without a sledgehammer and others that had components not even soldered on one side... so far all the KOOKYE's have been winners and have not had to replace any of these on my keyboards.

Work as expected, but the usb port is fragile, one was ripped out quite easily with little force.

most usb cables will not work plugged in fully

None of the three boards would show up in Windows. Device Manager detects NO hardware changes. Tested with different cables. Waste of money.

no problems with this.