Wathai 75mm x 15mm USB Cooling Fan 5V DC Brushless Turbo Small Computer Case Blower Fan for Cooling Electronics, Hard Hat, Helmet, and DIY Projects

The fans work great in my costumes. The fans kept me nice and cool. I love that the cord is long, so I could put the battery pack, I connected it to, in my pocket.

Moves a lot of air for their size. Quite on low setting. Loud on med-high. Grate for keeping amps or electrics cool for best longevity and proformace!

PROS: This fan works. Hooked it up directly to USB Power supply and it drew air and will be ready for hot days to help pull hot air out of my computer from outside the enclosure. Comes with a guard to help keep foreign objects from getting caught in the fan. CONS: I ordered the 120MM fan so that I could get a sliding switch controller as I suspected there may be trouble with the button switch controller. Hooking first time using the controller FAN would not work at all. Fan only worked when hooked directly into power supply. Yes I'd buy this again.

They're blower fans, they worked for the project I had in mind. If you need some more directional airflow these will perform the job.

These were great to cool my little minis forum micro PC. I was getting 180° on my M2 drive before and now it's about 95°

They have a noise but it's a soothing noise, like air. I wouldn't complain about it and they're nice and slim.

Used to cool sfp in a cabinet. Unit had been running on med speed for over 1.5 years. Still going strong.

The fans arrived broken. The wire strain protection is very flimsy, a couple tiny tabs that the wires weren't even held by (unclear whether they were never tucked under, or the tabs are ineffective at holding the wire), resulting in the wires being torn off and the fans unusable without a repair with a fine tipped soldering iron. The two-fan speed controller looks good, but it's no use if the fans are DOA. Update: The seller reached out and made it right. Having used the replacement fans, which also had inadequate wire retention clips (with the wires NOT tucked into them!), but knowing how vulnerable the wires are to detaching, I used some hot glue to secure these. The fans themselves work well. They're a little whiny (high) in tone, but not offensively so, and not super loud nor extremely quiet. The three-speed two-fan controller works well, though the fans are audible at all speeds. They move a good amount of air for a very small fan. The work well -- just watch out for the wires not being retained by the clip and getting tugged -- they're very fragile.

Work great for 3d printer exhaust fans

First things first, these things move a LOT of air. I originally purchased the more expensive AC Infinity model and I ended up returning them. These blow more air on the medium level than the AC Infinity unit blows on the highest level. I purchased two for very specific use-cases. One I have attached to a Nighthawk M1 because the thing was constantly overheating which destroys the hardware over time. Even on the lowest setting, the device is now cool to the touch whereas before it was HOT. The second one I purchased to affix to a 12V DC refrigerator to assist in dissipating the expelled heat. In the summer months, these fridges work really hard to combat the ambient temperatures and the internal fridge fan doesn’t move much air. Now I have these things sucking out the hot air which keeps the fridge running smoother and easier.

Perfect, no noise , big enough to cool multiple raspberry pi devices with 5v

This works really well in our RV fridge. It circulates the air from top to bottom and it’s very effective.

this little fan is so cool it usefull at a point i cant live without it! any projects i build i can use this to cool the systems down very fast and it reliable using USB with a spe ed switch 3 speeds on it. Very quiet fan. about 75% less noisy than other same kinda fans