Review on Raspberry IUniker 30X30X7Mm Brushless RetroFlag by Dewey Galyon

Not really much to say. They are fans. You push the air. :-) I used them as fans in a Raspberry Pi case. They were very easy to wire up, with one pin to pin #2 on the GPIO and the other pin to pin #6. I use a fan to pull warm air out of the case instead of blowing cold air onto the CPU. . It works surprisingly well and the temperature was lower than I expected. The fan I installed seems to be quite loud when I first turn on the RPi, but after less than a minute it's almost silent. I'm not exactly sure what the cause is, but if the fan fails completely I have a second one to use as a spare.