Review on Pack Of 4 Dorhea Brushless Cooling Fans - 60X60X10Mm DC 12V 6010 Ball Bearing Replacement For DIY PC Computer Case Fans - 2 Pin Connector For Enhanced Cooling Efficiency by Marco Carpenter

I bought these little things for radio and SBC purposes. They do work just fine.I have only one real complaint and that is noise level. They are a bit noisy for how much air they DONT move. You'd expect a bit more CFM from the noise, but. hoping it is quieter once placed in project case, and installed under seat of truck. I use one of these on a raspberry pi4. I am able to keep device cooled to about 45°C. That is with moderate to high processor use. Ambient air temperature has been 16-30°C.Fan is about 5cm from processor.