Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller Compatible to Pro Micro Serial Connection with Pin Header

Great product once you set it up properly. I too was having issues getting windows to recognize it. I'd plug it in and nothing would happen. Was getting ready to return it when I discovered there are 2 types of Micro-USB cables. One can only be used to charge devices. The other can charge and send data. The first two cables that I tried did absolutely nothing. It was the third cable I tried that Windows made the noise of a new device and it connected! And now I'm successfully using it for a project.

Used it to control an old-school IBM terminal keyboard to a USB port (using Soarer’s Converter firmware). This controller works perfectly, and had it configured in a morning. Value is very good and I needed it without the headers soldered.

These were so easy to flash.

I bought 2 of these for a keyboard and got it all soldered, tried to plug it in and the connector just fell off. Not using barely force. DON'T BUY!!!

nothing wrong and was able to flash it no problem.

Amazing chip but, very true what the reviews say about the USB port being sort of weak. It only lasted about 3-4hrs with me. Broke same day it arrived. Don’t get me wrong, they work fine I even bought two more but, it would be nice to get a stronger one. Maybe there is a solution to this that I’m not aware of. Anyways, great little chip.

all good---as promised...fast shipping

Might just be my ineptitude at Arduino, but I can't find the pins listed in the Arduino code.