ELUTENG Dual 40mm USB Fan with 3 Speeds Adjustable 5V PC Fan Max 5500RPM 40mm * 40mm * 25mm Mini Case Fan Quiet Computer Fan Compatible for PC, TV Box, Router, Xbox, PlayStation

They were good they function well just didn’t work out for what I was hoping for what I was using them for

I bought these for our gecko's small enclose to help regulate humidity. The 3-speed setting is helpful and it's near silent at all speeds. It's a pretty specific use case, but the size and quality are perfect for it.

Whisper quiet, and surprisingly good airflow for such small fans! I am using them on the low setting to cool a small audio amplifier. Works extremely well. The description doesn’t show it very well, but there is plenty of cable to work with.

I have a couple of pairs of these fans, as well as a 80mm sized pair, for cooling electronics. One pair of these 120mm fans is on my Yamaha receiver, the other pair is suspended behind my 32 inch OLD Sony LCD screen Bravia. The 80mm fans are behind my PS4, Switch, and Wii U. On the rare occasions I fire up the XBox One, I just move the 80mm fans up a shelf to where the XBone is. I don't know the exact numbers for these fans with regards to air volume they move, but it seems to me that the smaller fans force more air, but obviously they don't cover as much surface area. The fans don't help my TV much, which I expected. They cool my receiver more than I expected, and I think the 80mm fans are going to extend the lifetime of my PS4. That console runs really hot, especially at the power supply, and the 80mm fans help cool that very noticeably. Oh, and the fans are quiet enough that I sometimes forget to unplug them and have slept peacefully though the night with them running. Although it is summer here so I always have a large fan running anyway..... Anyway, I recommend the 120mm fans for receivers and the 80mm fans for video game consoles. Maybe I'll try some 40mm fans later....

EXCELLENT

I was originally planning on using these to help ventilate my AMS unit, but the airflow is too low. I eventually installed these in my wife's shoe closet to ventilate a wooden box with expensive heels. Not a total loss at the end of the day.

Using this for a Vive Wireless Adapter to keep it cool. There's a thingiverse design for a similar dual-fan product which I haven't printed yet, but I'm excited to try it. The fans themselves work well. The noise level is a little higher pitch than I expected, though. I worry that this might be a sign of the fans being roughed up during shipping or something like that, but they work really well and are cheap, so I'll use them until they fail. Not much else can be said about this product. It's 2 fans with a long cable and a switch. It's easy to power and easy to find a use case for.

This is a repeat purchase. As the 1st purchase, this is good for the $ and performs as stated. The old (~2 years) is working good and silent operation.

Low noise . 3 speeds that seem to actually be different. Seem well built and are fairly powerful.

ボタデンの充電時のファン吸気と排気の所に付けて使用 ファンの回転も3段階あるし気になる音も無く良かった

Petite fan tres efficace , reglabes 3 vitesses peu bruyante parfaite pour une enclosure de mini pc.

二つの送風機を一つのスィチにより入り切りができる。

Exactement ce qu'il me faut vraiment silencieux même a fond fournit avec 4 visses de montage et 4 visses aux grillages