CRJ Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable

Bought one and it worked well so bought more. All cables are working fine.

Working pretty good with my 200x200 cooling fan (12V, 0.42A)

Tested out a few fans and a pump with this cable.

My son bought this to use with his custom 3d-printed laptop cooler/stand (designed/built/printed himself). He ran two 120mm fans off of it and it worked great. No issues with the USB port or the fans when using the cable.

There are a couple of comments re frail materials/build on this one, while I can see whats being referred to, and yes, the join on the fan connection end could be better finished, I really cant see where this would cause a problem with normal use. After all you should be treating any cabling gently and well. A USB 3 connection fired the PWM12 fan up and it certainly cooled the object(s) in its path!

This is probably just a cable with a micro buck boost installed in the cable housing, but its perfect for testing fans and/or using it to power up a spare fan for a desktop cooling device. Only thing Id knock is the price.

Ive pugged this into several different charging blocks. Works great, awesome for testing fan motors. I bought it to use in a soldering vent setup, keep using it to test computer fans.

Purchased CRJ Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable for testing and powering 12V fans. Adapter is made of high-quality materials and is easy to use. Works perfectly for testing 12V, 2 to 4 pin fans. Highly recommended!!!

This was exactly what i needed to repurpose an old tower desktop fan. The fan was still great, it just needed that bridge from 3-pin to USB. That being said, as everyone mentioned, this is just a two pin setup. But the fans ran as soon as I hooked them up and plugged them in to a USB outlet or a plugin adapter. This will run the fans at full speed and you will get a fair amount of breeze. Perfect for how i wanted to use this to cool additional electronics.

I bought this to use with a 12 volt dehumidifying telescope fan. It works as expected and the fan runs at full speed.