AC InfinityMULTIFAN Mini, Compact 40mm x 20mm USB Fan, UL-Certified for VR Gear, Aquarium, Roku, Router, Raspberry Pi, Cosplay, Helmet Cooling Ventilation

This isn't the first AC Infinity fan I've bought. On electronics that put out alot of heat, quite often the manufacturer doesn't provide for adequate ventalation so you have to replace your equipment more often, and they make more money. These fans help to remove that electronic destroying heat and extend the life of your investment! I used this particular fan to cool my D-Link Router, which puts out alot of heat, but yet has no cooling fans. Because of the small size of this AC Infinity fan, it is perfect for the improved removal of heat from the router. Plus, since it sets adjacent to my computer, there are plenty of USB ports handy. In the past I have also used AC Infinity fans for cooling my TiVo Bolt and my television. The fan is described as ultra quiet, which I feel is an exaggeration. It's quiet, but not ultra quiet. If I had one complaint, it would be that the cord is so long for MY router application. It would be nice if the cord length was adjustable. This item is designed in California, but it's MADE IN Communist CHINA. Despite being made in China however, the quality seems to be very good. I recommend this item.

This fan is awesome! I didn’t expect much but it actually is a quality product, silent and very effective.I was searching for a cooling fan for Nintendo switch, there’re a lot of aftermarket products; most reviews on those that they’re either too loud, broke down too soon, or of cheap quality. Also, most cooling solutions aimed for the Nintendo switch would require to be either attached to the duck or to the console itself which would deplete its charge.This fan has the option to connect independently to a power supply or the dock, yet stay detached and mounted conveniently where you could place anywhere around the device you want to cool down or help in exhaust air suction.

I bought four of the 4" fans to squeeze into the rear slots in my entertainment cabinet. I suspected that I could use the silicone rubber feet to mount the fans, and it worked! The fans are held in place solely by the tight fit of the silicone washers against the edges of the cable cut-outs in the back of the cabinet.Since they are tight, and the rear of the cabinets are thin wood, at their highest RPMs, the fans make noise louder than the Xbox One X in the cabinet. However, at the "Medium" settings, the fans are no louder than the game console, and at the "Low" settings, the fans in the game console are louder.They really move a lot of air at the highest setting. I could feel quite warm air exiting the cabinet from the fans directly behind the Xbox One X, which vents heat out the rear of its housing. The other fans that were pulling air from mostly empty space were blowing out cool air.You can daisy-chain these together, but the speed control seems to affects all the other fans downstream. I had four of these connected together, with only one of them plugged into USB power. When I set the fan plugged into power to Low, the fan at the end of the chain stopped. Presumably, the other fans slowed down.

As an IT Admin for a small Transportation Company we have a large monitor set up so we can view all of our vehicles out on the road. After the remodel we wanted a better solution than using an older Dell PC which was using up precious desk space. We purchased an Intel W5 Pro with an Atom x5-z8350 & 2GB of Ram running Windows 10 Pro. As we just needed it to display a web browser we felt this solution which would free up space as well should do the job.After a few months of 24/7 operation I noticed the fan was starting to fail and temps started to rise. Finding the actual replacement fan didn't seem to be an option due to how proprietary the little fan was. Looking for a USB powered alternative I stumbled across this, took off the case on the W5 and strapped it to the top.Ugly? Sure, but as you can see adding the fan brought temps down from 70/80c to 36c!! With averaging around 55 or so with a moderate work load. As far as acoustics it's fairly silent on the lowest fan speed setting. I experimented with turning the speed up but didn't make that much of a difference. So keeping it on the lowest setting is best.The monitor has a USB port where it pulls power and the nice thing is that it will go to sleep when the monitor does. It is not connected to the compute stick as I didn't want to stress the little device any further.So... great little fan for 10 bucks. Moves a good amount of air, is quiet and has 3 speed settings. I highly recommend it.

The fans work perfectly, are good quality, and are silent. Some of the negative reviews indicate that these fan do not move much air. While that may be true compared to other similar fans, these usb fans are not intended to have a high CFM (cubic feet per minute-it is a measure of air flow volume) and their intended purpose is not high velocity. High CFM fans are loud and are not low voltage usb. However, the 2 fans together allow for increased cooling without noise. There are other products if you need high velocity. If you purchase the wrong tool for the job, it’s not the manufacturer’s fault that it did not work for the intended purpose. Additionally, AC infinity’s customer service is extremely responsive and courteous. They responded to every inquiry, did it quickly, and resolved the issue in my favor. AC Infinity is located in CA.