ANVISION 2-Pack 40mm x 10mm DC 12V Brushless Cooling Fan, Dual Ball Bearing, YDM4010B12

Good quality little fans. Not too noisy for my application...work great. I had to reverse the pins which can be done by inserting a pick and depressing the tiny clip. Check your application and do this before installing or it can be a pain like it was for me, lol. I was in a cramped location and already installed the fans only to realize I should have switched the plus and minus, heh! If they were out of the equipment it would have been much easier...but overall, absolutely no complaints, worked perfectly hoked right up.

To be honest, I was pretty worried that the fan was going to lack in performance due to its small size and cheap cost, but I was pleasantly surprised to find this isn't the case at all! I'm using this fan to push some air through a box with some hot components to help with cooling, and although this fan isn't silent, the noise didn't bother me. Pros - USB connection means no soldering and easy use with a power bank. - Very cheap (and comes with 2 fans) - Very good airflow for such a tiny low power fan - Thin and small design if perfect for mounting in a little project case Cons - I'm a little worried about accidentally tugging on the exposed (glued in) cables near the base of the fan - Relatively quiet but I still wouldn't want this running near me all the time - Does NOT come with any screws, washers, or other mounting hardware as opposed to the Noctua fans.

For the past couple of months I've been using these fans to push air through narrow ducts and to improve cooling for Raspberry Pi cases (only one of which is pictured). So far they've provided very consistent cooling for all intended purposes with stable reliability, and while you can hear the fans a slight bit in a completely silent room, the sound is unnoticeable if other ambient sounds (computer fans, AC, etc.) are present in the room. When combined with two heatsinks and quality cases, I was able to drop temperatures below 30c on my Raspberry Pi 4s. The only issue is that it's easy to snap the wires where they attach to the motor of the fan so be sure to exercise caution when installing them. Bottom Line: Overall this two pack is a great value buy for two USB 40mm fans, and given that you need both and don't mind the minor noise level, there likely isn't a better currently available for these unless you opt for a different method of powering them (like the GPIO pin versions). UPDATE 3/24: After running these fans on higher settings, they definitely make a lot more noise. If used for 3D printers with the intent of quieting them or for any application involving higher power settings, they become extremely noisy.

One of the out of the box issues with using the Raspberry Pi is the fan staying on even when the Pi is safely "shutdown". Since most fans are connected to the 5v gpio pin, power will continue to run the fan and there no way control it from those pins. One option is to use a moffet pcb to cut off power to it without damaging the fan but then you may require soldering which can problematic for some folks. The other option is to use a NPN transistor to control the fan from another gpio directly. This is actually a good way to handle it as you can code how you want the fan to function, when to activate it based on powering on the Pi or even based on the current temperature. But, you'll have to properly wire the transitor and do some coding and that maybe scary for some folks too. The easiest way to handle the fan is of course, by using a USB fan. Basically, if the Pi is on, power is sent to the USB port to turn the fan on. If the Pi is off, power is turned off from the USB port thus turning off the fan. No coding, soldering, or transistors needed. Granted you will have to give up a USB port but totally worth it for me. I'm using this fan for a game console rebuild and it's perfect for what I need. Runs quiet and keeps the Pi cool at 45 degrees consistently. Definitely recommend this one for anyone doing Raspberry Pi projects.

Perfect fit for the Hunter Air Sanitizer model HP247AP Fans. Lower price than replacing the whole unit!

This was delivered fast and in perfect condition. They move a lot of air for their size but the pitch frequency and noise level are higher than I expected. I'm being picky here. Compared to a room exhaust fan their like a whisper.

Quiet and tiny, but they ran for about 1 working hour before dying. I will say that the vibration in the application I was using them in was definitely a lot higher than what they probably test this for, but if you intend on for anything other than stationary use, they won’t hold up.

I got a pair of the 12V 40mm fans. They work well. Wire gauge is a little light but these are low current. Wires are properly supported over the fan blades unlike another vendor's.

Petits, costauds mais bruyants. Je ne sais pas d'où viennent les 26 dB mesurés. Pas possible ! (26 dB c'est pratiquement le silence et ce n'est pas le cas)

音も静かで今のところ不具合はなし。

Buen precio o y siguen funcionando perfectos

arduinoのCNCシールドを使っているが定格以下でも加熱して停止する時がある。サイズ的にちょうど良い。

Tutto OK