Noctua NF-A4x10 5V PWM, Premium Quiet Fan with USB Power Adaptor Cable, 4-Pin, 5V Version (40x10mm, Brown)

It’s exactly what you want it for. Has great air volume for its size, fairly quiet from the easily controlled low speed to full speed, it’s the perfect size for those Pi projects, and it’s a Noctua fan. It’s built right, great price and keeps your small electronics cool.

Used this to cool an Asustor 2.5G switch that was constantly overheating and crashing. Just needed a 40mm metal hole saw and voila. It's plugged into the server next to it for power, no adapters or long extension cables necessary. Looks clean, is quiet, and works fine to cool the switch. Noctua never disappoints.

This Noctua fan moves a lot of air, and is quiet for its size while doing so. The included USB power cable is extremely useful and can be plugged into a USB fan governor for manual fan speed control.After being unimpressed with laptop cooling solutions, using these fans with a cheap plastic laptop stand gave my gaming laptop better airflow than any of the all-in-one solutions ever could.

Nothing beats this brand of fan I do what I can to replace any and every device in my house that uses a fan with one of these they move there better and they're quieter from consoles to filters to computers. Your consoles will last longer Dreamcast Xbox original GameCube you can replace those fans with these if you get the proper size look it up on YouTube

Just got the fan was on backorder for two weeks and so far very happy with it; I needed a 5V fan powered off USB, and this has both. Quiet as any other Noctua fan while performing very well. Use it to cool my Vive Wireless VR adapter that overheats after 30 minutes of use normally. The cable quality is excellent got a rubber sheath and heat shrink molding, though this is also a complaint as outlined below. Will likely buy one or two more soon to replace the aging (and loud) fans for networking appliances.Saw some reviews comment on excessive packaging, well this package is much more environmentally conscious, no huge plastic holders to all the different parts, just a cardstock box and fan holder.Not really negatives but if Noctua is looking for feedback, been replacing new computer builds with the Chromax black version, so hopefully Noctua can make these in black one day. I don't really need my fans to stand out; they just need to their job. My only real gripe is the cable is fixed length; since it's a small fan it's likely use in limited space environments that don't need such a long rubber sheathed cable. All my newer Noctua 12V computer fans come with a short connect on the fan and then few extension choices, this one is a fixed 30 cm cable.

Noctua Fans are always perfect; all the parts are there for install and built quality is no.1

Pricey but unbelievably quiet compared to cheap fans. I used this to replace the noisy OEM fan on my Ham Clock and now can't hear the fan six feet away from the CPU

I used this to replace the control board fan in a Bambu X1C 3D printer - the stock fan is of poor quality and becomes noisy, with many users experiencing this. (I do expect Bambu to change suppliers.) This fan fits where the stock fan does, but requires that you splice the original connector to the Noctua cable. This is where it gets annoying.The so-called "OmniJoin" is just a set of four pushbutton splice connectors. You have to cut off the Noctua connector and splice the individual wires to those from the original connector. The leads must be stripped, and you have only one chance to use the splice button to connect them. I gave up and soldered the leads.Noctua fans don't move a lot of air, but they are quiet. For this application, the fan was fine.