ELUTENG Dual AC USB Computer Fan 140mm USB Fans for Cooling 3 Speed Control

I bought this fan to put under my adapter because I can be hard on it. It keeps it cool while I am gaming and my heat issues with my gaming laptop have reduced significantly. It's easy to use, it's pretty quiet, and it does it's job. It has made gaming SO much easier and I love that it is helping my adapter last longer too.

Very quiet, power cord is a little short, but it works great. I'm using it to cool an overheating portable oxygen concentrator.

Hooks up to my USB port in the back of my vehicle. Low, medium and high settings all put out a really good breeze! Extremely quiet and super lightweight. Has been pretty reliable so far to help keep my dog cool while traveling and waiting at events. For a Ruffland kennel fan I recommend this and it’s affordable!!

Works well. Really quiet....so quiet, I've actually left them on overnight (mistakenly), because even though I turned off any / all noise makers in the room (ie: computer, tv, etc.), I didn't even really notice the barely noticeable "hum" of the fans (they're that quiet). Turns my warm (almost hot) External HDD's almost room temperature (when I touch the running HDD, I can't tell from the temperature of the casing that it's running...only from the movement of the platter / arm). Like the fact that it has "Feet", on the corners, on both sides, so that you can not only elevate the HDD off the desk allowing more HDD case surface area for heat dissipation, you can either BLOW air onto the HDD, or SUCK air away from the HDD (depending on your needs)...just turn the unit over, depending on which way you need the fans to go.

Good little fans, low noise and moves air pretty well. For me, I separated the 2 fans to cool my NVR on 1 rack shelf and a PC on another rack shelf. Keeps the NVR and PC nice and cool. I also like that the fans run off 5v USB-A plug so I don't have to run them to 110v AC plug, I plug them into the PC USB port, done!

Ps4 no longer sounds like a jet engine taking flight, it really is very quiet and even running heavier games it's made quite the impact in keeping the system cool! I could almost see if you wanted a super quiet fan for your desk this would probably be just as great, it's that quiet and effective.

As for the size, it fits my laptop perfectly, and the pads keep it from sliding around which was a concern at first, but it's definitely not going anywhere! The fans themselves run off of a USB cable, with a slider switch from off>low>medium>high and barely make any noise at all. In fact, my own laptop's fans are louder. These things are BEEFY by the way, i use a pretty low-quality, unmaintained ROG Asus gaming laptop with a 1060 that usually heats to 91C. This thing bumps it down, at 70%-90% load, straight to between 68C and 87C. That's a pretty big improvement, if you ask me. Also the plug being USB is pretty useful. I put it under my laptop but honestly this thing looks pretty versatile, you could probably use it for other stuff too if you want. Very good cooling fans, would definitely recommend if your laptop overheats and slows down.

Edit update: I revisited using this dual 40mm fan that actually comes with a small heatsink! It’s still too noisy, but it’s a strange high pitch noise I’m guessing from the way the air flows thru. However, after taking the kit apart, I was able to relocate the grills and place one under an ATV4K box and one on top, with the little heatsink placed on top of the ATV4K and under the second fan blowing air onto the heatsink. Crazy enough, the heatsink almost immediately pulled heat from the ATV4K box but with one 40mm fan on bottom (with the rubber bushings down, the heatsink on topside and the 2nd fan on top of the heatsink blowing air down onto the heatsink, it worked extremely well!!! The ATV4K went from temps of 110-115 degrees down to 93-95 degrees (or less!)!!! And that’s with the dual fan on low!! So if you have a small electronic device that has no built in cooling, I highly recommend getting something like these to help cool it down. Unfortunately, the dual 40mm Eluteng fans are still too noisy, especially on med/high, but if you locate the device you want to cool behind a big tv or entertainment center, the noise should be low enough to take advantage of the cooling effect. Raised to 3 stars from 2 Way too loud!! Doesn’t blow enough air for the noise it makes. I shoulda returned these but they were so cheap I just threw them in a drawer for now. I purchased 3 different brands of 40mm usb fans to mount on the back of my 77Z8BA OLED tv to act as exhaust fans and these were the worst of the 3. Ac infinity 40mm had the best cfm but the scccf 40mm was the least noisy, at least at low rpm. All of these 40mm fans on high are impossibly loud/noisy.

Oh it's bigger then I expected wow it brought my drive disk temp down by 10° c so u can't complain just just on default speed. I can't complain Makes no sound no vibrations and a constant speed I am using its own USB dock and not a laptop or control bored USB. I haven't tested it's threw a ps4 port ps5 ECT..

I bought this to stick behind a ps5 because it sits in a fairly narrow shelf. It runs off the rear USB port. Because it's a 5v fan it is pretty low rpm but it still gets the job done and isn't obnoxious and loud.

Very good quality. Serves the purpose of cooling our wifi modem very nicely.

The fans move a good amount of air for their size, however I dont know if I got a faulty set of fans but they make a grinding noise that is very noticable at the low or medium setting. The mode switch itself gets unusually warm when on the high setting, but thats negligable compared to the grinding noise. I originally bought these to cool my 5G Hotspot and laptop charger, hoping that a dual fan setup would be quiet enough on the low setting to not notice a few feet away. The grinding noise is audible unless in the high setting.

Quiet running even on high speed.