Wathai 2Packs 40mm x 40mm x 10mm 12V Turbo Blower Brushless Centrifugal Fan 2Pin

After about 200 hours of operation, the bearing failed and the fan started screeching like a banshee. Lifted the label to see if applying a drop of oil would bring it back. Discovered the manufacturer blocked off the spindle with solid plastic, rather than just a sticker like most use. Since you can't add oil, the only thing you can do is toss it in the trash.

I was very pleased with this when I first installed it. It was quiet as a whisper for about a day and then it went to vacuum cleaner up the hall noisy. I've had it installed for 2 months now and I can hear it starting to fail. It's pulsating so I'm in search of another fan. Look for something better.

I'm using 2x of these fans in a custom amateur radio box for active cooling and hydrogen gas disspation. They work well, keeping the radio well ventilated, and power consumption is in line with the stated 0.1A.Brand new, they made scarcely any noise. With a dozen hours on the clock, a slight droning noise became normal. And certainly these things get extra noisy if the case you're mounting them to experiences any sort of movement or g-shock, but smacking the case will help quiet them temporarily.Not a dealbreaker for me since the radio's speaker easily overcomes the case noise, but your use case may vary

Used this in an active cooling rig for my old S7 used as a dashcam. Tapped power off of an extension to power the phone/dashcam. One of these had a manufacturing defect which prevents the fan from turning. *thumbs down* .... The other unit (ordered the 2 pack) works fine (in service about a month), but when cold (30-40F), at startup is EXTREMELY loud... This indicates the bearing sleeve is of extremely poor tolerances... That said, 1 month in, it hasn't failed...

Apart from the power connector, this fan was a drop-in replacement for my Asus mini-computer. Sadly, the first fan failed within a few days of installation, making a LOUD screeching noise. Clearly, the bearings were bad or perhaps didn't have adequate lubrication. Since it was a pack of two, I installed the second fan and it's been working fine for a few weeks now.UPDATE: The second fan has now failed. These things are junk, find a better fan if you want your computer to be reliable.