Dc 5V USB 92mm x 92mm x 25mm Brushless Cooling Fan

I bought this as an extra fan to cool down my pc best thing is they have portable USB styled connection so whenever my PC is on render I add them and keep them aside once done. Highly recommended

The problem I had was that the external hard drives connected to a NAS built on a mini-pc in a homebuilt rack would run warm if a backup started while I was out of the office and the air-conditioning was off. The possible solutions were either to leave the A/C on all the time, which was stupid; or to buy some fans, which seemed like a much smarter choice.So I bought these fans and banged a few more pieces of wood onto my homebuilt rack to hold them in place. They're just wedged in there between the wooden rails on the top and bottom, pointed so the air flows toward the back, over the four external hard drives.The idea works. I had the A/C off most of the say and there were no S.M.A.R.T. warnings. The drives seem very happy now.These fans have no speed control, so they run full-bore all the time and are a bit loud as a result. I was going to wire one in, but I don't hear so well anymore anyway so I decided not to bother.The fans seem well-made. They move a lot of air. I didn't measure how much air they move, but it's enough for my purposes. The hard drives are now cooler.The finger guards should guard adult fingers okay; but I think a toddler might be able to get their fingers in there if they tried hard enough. I don't have a toddler handy to test that hypothesis, however; so I'll just advise you to not use these fans where toddlers with a love of science might want to test my theory.In summary, they're good fans. They spin around and move air, and they do it very well. Since that's all I expect of a fan, I'm giving these air-movers five stars.

Yet another update: they read the review and offered a full refund without asking me to change it or anything, so I guess they're trying. Maybe I just got a defective one?2nd update: one of the blades broke off one of them, I pressed on another blade to see how durable they are. the answer is, they're not. It broke off with very little pressure. Cheap garbage.Update: a few weeks later they're starting to rattle and make a bunch of noise sometimes.Got a projector that constantly overheated, got it replaced and the replacement overheated too.. So I decided to MacGyver up a solution. With just a dremel tool, some duct tape, and a couple of these usb fans, I now have a projector that can run all day. Lol. It could look better, but hey.. It works.

Had I known these two tiny fans would produce so much noise I would have opted for the Noctua fans. Sadly these will not work for my project so they get to be hobby fans now.

I got these fans to use w/ a wifi router that runs hot in an even hotter the attic. This was packaged well and came exactly as described. I appreciate the fact that this arrives w/ a grill when most fan set ups do not. It had everything I needed to get these installed and running quickly. Air flow isn't the strongest but this is plugged into a 5v slot. Might run faster if the input was more. Either way, does what it needs to do and would highly recommend these to anyone wanting to cool down their devices!

I use this game to keep my apple express router cool, it does a good big and I have not had a over heating problem. It does run a bit noisy but not to bad. They don’t feel cheap and the metal grid keeps the fan safe also the usb is a good length.