Wathai DC 4010 Blower Fan 24V Duall Ball High Speed with 1000mm/ 3.3 ft Wires 40mm x 10mm 24 Volt DC Brushless Radial Turbo Fans for Ender 3 Fan Upgrade Extruder Hot End Cooling 2 Pack

These are small in size but moves lot of air. I am using it in one of my devices with Raspberry Pi to basically mover air from the case. It cools everything very effectively. Its loud at full speed, I drive these at lower voltage to reduce its speed slightly and the noise. I am not sure how long it will last but so far it seem fine in build quality.

Ordered these as I was needing some small and quiet fans for air circulation in a tree frog terrarium build. I had previously taken measurements of the clearance on the underside and top of terrarium top so I knew exactly what fans would fit perfectly into the position I had planned. Now, when these fans arrived in the mail, I did another careful measurement of the exact hole size needed to match up with the fan blade width. Along with pre-drilling the necessary screw mount holes. Everything was going as planned and was looking nice. On a side note, I had also ordered black metal mesh covers that would fit these small fans as I didn’t want any tree frog fingers going into those fan blades. :) after gathering up the screws I needed , I got to work getting everything mounted into place. Listen, I couldn’t be happier with how well this worked out. Not only does it work good, It looks like a professional factory installation. But I’ll let you be the judge by the photos I have added. The only thing left to do now is get the wiring to run down the underside bottom edge of inner lid. Since that will be a cakewalk, I will work on finishing that part first thing tomorrow. As for these fans I ordered here, these are perfect. They have speed control switch and I noticed that I could probably just run these on low for more than ample air circulation. You would be surprised by how quiet these are for how much air they push. That along with they aren’t creating any unnecessary vibrations or annoying sounds. I was worried I was gonna have to use a diy thin rubber gasket to mute that situation, but happily it wasn’t needed. These would definitely push more power than I would ever need for a terrarium, but like I said earlier, running these on low not only cuts that air flow down, but also keeps them at their quietest setting. I honestly can’t even hear these running while standing right in front of the tank. Now I can’t speak to how well these are at helping cool PC computer parts, And I can’t attest to how long the lifespan will be on these but I can tell you these were exactly what I needed for my project and worked perfectly for my personal needs. So maybe somebody reading this is looking for similar fans for a similar project. If so, these are the ones you should order. Just remember to buy those metal mesh fan covers that will fit this size of fan to keep your (inhabitants) safe. These do come with the fan grill covers, but those will not be good enough by themselves. So I used both. Hope you like the looks of how it turned out as much as I do, and I hope this review helps somebody out in some way. P.S. as another helpful tip if using these for the same purpose as me, think about pugging them into a auto timer. You can then just have them turning on and off by themselves when needed, like if you want to cool your terrarium during nighttime hours like a natural ecosystem. One simple way to accomplish this is to couple a/your lighting timer with these fans. For instance, fans power on at the same time the nighttime lighting clicks on, and daytime lighting powers off. If you plan on using a fogger for humidity control, it’s best to have them running on a separate auto timer. It’s best to only run them for about 20 minutes or so during the morning as the daylight lighting turns on. This creates that natural morning fog and dew on the morning grass scenario. Just keep in mind what will be living in your tank and what best suits their natural habitat, humidity, temperature, and weather situations. Have fun and create your own little world. :) if you like this review, give it a helpful vote. Thanks.

Good overall quality but very loud fans

I put these in my boots when I'm out camping. Plug them into a power bank and my boots are dry by morning

Move an impressive amount of air at a reasonable sound level. Have been running a couple on a 3D printer and after several long printing sessions they’re still working great and no bearing noise like the factory fans.

I bought two sets of these. They move a lot of air but durability/longevity issues. One fan from each kit has failed, locking up and making a bunch of noise. These have been running 24/7 moving warm air from a stack of Dell SFF PCs for 7 months now, they started to fail about 5 months in.

I used this to replace the blower fan on my 3D Printer (Geeetech Mizar S -- the shrouded fan that powers up after the first layer is placed). It works great, and the extra-long cable was nice (I only needed a few inches of it; I cut and spliced it to the original, smaller connector from my faulty stock fan). I did notice it's a bit louder, though, as it is a more efficient blower fan than my stock; in fact, I had to drop the fan speed settings by 25% because it was causing some of my print jobs to warp by the 3rd or 4th layer drop. Not a complaint, as I've been printing for years now and am quite used to adjusting its settings, but keep that in mind if you purchase this for your own 3D printer. Recommended. Will update this if it prematurely fails (as of this post, I've only used it for two days now -- about 5 print jobs so far).

Absolutely incredible. I'm in a heat wave, camping in the Midwest. This little thing is honestly, and I'm not exaggerating, saving my life. My state has a heat advisory warning in effect. I have a small portable phone battery that I'm using to run it. Ran it all night and still have more than half a charge. Great airflow, nice and quiet, even on high. Fantastic product! This is a great deal.

Decent airflow from USB connection and quiet. Max speed is barely audible, lower speeds are basically silent. Includes guards for front and back and screws with nuts. Doesn't include standard short PC screws, but they do fit if you have extras. The wire protection ends right there it's most important where it connects to the fan so -1 star. 3D printed a mount to attach to electronics.

I built a very humid terrarium and needed a light added airflow but needed something compact, able to be speed controlled and sleek enough so I don’t see them. These work perfectly added both to the top back corners drawing air in and blowing down and out the front. The noise isn’t horrible, just note these are fans and have motors that spin which makes noise but are quite enough you can talk or sleep in the same room. I have a waterfall in the enclosure and can barely hear the fans

Allait bien meme tres bien mais apres 3 mois 1 des 2 a commencé a vibrer pour me rendre compte qu'une ailette etait sur le bord de decoller:( Évidemment 1 mois trop tard pour le retour admisible

VERY quiet, even on high. (Much better than the other one I just returned.) The large size is perfect for additional ventilation of my desktop computer (it sits on top, over the grill.)

fan after week of working start to be noisy i do not recomend