Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)

The fan is quieter than a typical cheap fan you can find online. However, it doesnt seem to be as quiet as I would expect for a fan from Noctua especially at this price point. However, this being a 5V fan, it does work quite nicely off USB power (adapter required).

Small but effective. Also quiet.

as expected

I wasnt sure the built-in fan on my Lulzbot Mini 2 3D printer was working properly anymore (filament was melting sometimes in the area where it shouldnt), so I got this as a replacement. Its somewhat quieter than the original, and appears to be more effective as the problem I was having has since gone away. I was also impressed by the packaging and included materials - good value for the money.

Well packaged and all parts well made. When installed in my security system produced a high pitched whine much louder then the slightly noisy cheap fan I was replacing. Removed this and replaced the slightly noisy cheap fan back in the system. I will keep this for some other project where noise is not so important.

Very very quiet. had to check if it was running. I used 6 of these in my 3D printer upgrade. Next Ill use them to replace the fans on the power supplies. Many people complain about the cost and compared to cheap fans they are, but relatively speaking they are not. You can spend $14 on a meal at a fast food joint, Id rather have a quiet, quality fan. The mounting and wiring options included make another trip to the hardware or electronics store unneeded.

This with a 3d printed bracket works well in the Dreamcast.

Worked great for replacing amcrest loud fans!

Got this for a pi4b. Works. Yay Noctua!

Perfect replacement for the fan on my Amcrest DVR.