ELUTENG 120mm USB PC Fan 5V with L/M/H 3 Adjustable Speed Portable USB Computer Fan Electronic Cooling Fan 1500 RPM with Metal Grill for Laptop/TV Box/AV Cabinet/PS4/Router

I bought these to put under central heating radiator rather than purchase the purpose made ones at four times the price.I have a narrow column radiator standing at about 6.5 tall and is partially covered by a small set of drawers.I placed the fans on a raised mesh small platform under the radiator behind the drawers so it can draw air, I wanted to stop the warm air pooling in the corner, I plugged the fans into USB socket and then into Alexa Wi-Fi plug, so the fans are controlled by voice, I can give the command to just turn it on for a specific amount of time or just turn them on and off Ad-hocIt definitely made a difference, a can actually feel the cooler air being drawn from around my feet,the hear is more evenly spread in the roomI have them on low speed which is perfectly adequate for me, if there is no other noise in the room it’s barely audible, but once the TV or radio is turned in or your in conversation you can’t hear itI’m now going to purchase some more for a radiator under my bay window

I am using this to help cool a Linear Power Supply. Rather than the fan extract the heat more rapidly I removed the grill and turned it upside down to blow cool air into the power supply. Even on the low setting it has performed exactly as I needed it to. I didn’t want to freeze the LPS just bring the heat down a few degrees. The 40mm size is perfect for the Sengterbelle 12v LPS leaving enough venting either side of the fan for the air to escape.I would like to know how long I can leave this fan on for but there is no info on a constant run so it looks like trial and error but in the meantime the heat is under control even without going high on the setting, works just fine on low. Some say this fan is noisy but seriously I am not sure what they maybe using it for but I have had louder mosquitoes in my ears than this fan! It’s quiet.

I purchased this as I need to call my N100 NUC, and that thing can be cooled probably with a small fan at very low RPM, but even on the low setting there is still too much RPM (slower than standard USB fans but not slow enough), they need to make these spin as low as about 300-400 RPM. This is probably still going at about 1000 RPM.If there was no buzzing noise, I think the noise would have been good enough but the buzzing noise is louder than the entire combined sound of all my PC case fans. Close but no cigar. If only Noctua made low RPM 80mm fans.

Works great

This fan is very quiet on the low setting and moves a lot of air through it. Very good fan.

I have used this fan to circulate the air in a home made 3d filament dryer and it works a treat.I especially like the speed control function.How long it will last,I don't know so I'll report back.

they work but making noise even on lowest speed.

Does what it should very cool it’s knocked the temps down on my pc very well highly recommend