Review on 💨 Improved MakerFocus 4pcs Raspberry Pi 4B Fan with DC Brushless Cooling and 3.3V 5V Heatsink Cooler Radiator Connector, Separating One-to-Two Interface for Raspberry Pi 4/ Pi 3/3B+ and Pi Zero/Zero W, Ideal for Other Project Uses by Robert Blair

I bought this to replace the fan that came with my Raspberry Pi (because it was very noisy) and no problems so far. The only problem was that the screws that came with it weren't compatible with my case, but luckily I had the screws from a previous fan so that solved the problem. All in all a great product. The only thing was going back to the Revain product page to see what pins are offered for connecting the fan that could be improved with a set of instructions on a page in the box or even as part of the box. However, I am very happy about these new fans.