ELUTENGDual 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

I use these 40mm 3 speed fans for cooling my JBL Soundbar 9.1 as sometimes the soundbar would get hot and turn off. I plug them into the TV USB port with a 5' extension cable so the fans turns off when I turn off the TV. Do Not Use the JBL USB Port, Not made for USB fans.Fans are very quiet even on 3rd speed.I gave 5 stars.

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.

Using these two vent out heat from both an Xfinity cable DVR box and my mini ITX sized Home Theater PC that are in a glass cabinet. They happened to fit perfectly in the wire holes already cut into the back of the cabinet.Warning: if you require complete silence these are not for you. Even on the lowest setting they “whir” so beware. Overall very effective at pushing air out of an enclosure cabinet. These would be good for a PS5 or XBOX that are enclosed in an entertainment console.

I have a couple of portable solid state drives that I transfer files back and forth. They get hot doing this and these fans keep them cool

I was worried they weren't going to be really fast but they are quiet fast. They are pretty quiet to.