Wathai 120mm x 32mm USB Centrifugal Blower Fan 5V DC Brushless Motor with Speed Control for Receiver DVR Xbox Modem AV Cabinet Efficient Cooling

Made a box to dry beef to make biltong (South African jerky of sorts). Used one fan to blow in, one fan to exhaust, and an old Apple iPhone power cube runs it all. Awesome solution. Fans are very quiet, but I also ran them on lowest setting (for a week!). Tiny fans, quiet, nicely adjustable.

I bought a few of these to blow air into rooms in my house through open windows to cool them down, and they work amazing. For the noise, they move a ton of air and the ability to adjust the speed is just icing on the cake. Worked perfectly for my application so I bought a few more for other projects. Really nice fans.

PROS: This fan works. Hooked it up directly to USB Power supply and it drew air and will be ready for hot days to help pull hot air out of my computer from outside the enclosure. Comes with a guard to help keep foreign objects from getting caught in the fan.CONS: I ordered the 120MM fan so that I could get a sliding switch controller as I suspected there may be trouble with the button switch controller. Hooking first time using the controller FAN would not work at all. Fan only worked when hooked directly into power supply.Yes I'd buy this again.

Using on top of a receiver inside a cabinet to keep it cool. Built a new media center with enclosed cabinets and my old denim receiver burnt out within weeks. These fans sit on top of my new receiver and keep it under 80f where without it was getting to 95-100f. Just make sure your power source is strong enough. Started with a power brick that was underpowered and they stopped working. Used a bigger phone charger and now they're back to working great

These tiny blowers move a fair amount of air and, while not silent, are reasonably quiet. So far they are running well.

75mm x 15mmI got this to cool a computer that sits on my desk and even with an adjustable potentiometer its very loud. At lower speeds it makes a whining sound and anything above that is just loud on its own.Besides that it works well.

I had a problem with heat when I mounted my router vertically. I made a plenum out of 1" square stock and glued foam to it as shown. I hot glued the fans to the backing board. I then mounted my router, set the fan power to mid range and heat problem solved.That worked so well I also bought another set of fans to cool my modem. Again, hot-glue was used to mount the fans as well as to provide sealing the area around the base of the modem. Very Effective.

Try something else.