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

This is exactly what I wanted and exactly what I expected. Im using this to power a case fan that I no longer need and use for other purposes.

Works as designed (regulates all input voltages to 12V). however did not meet my need as i hoped it would be proportional to input voltage. My mistake not mfrg.

Duha , fans appear to be spinning at full speed

When it works it works great, it steps the voltage up to properly use a 12V .25A static pressure fan and I appreciate that. Unfortunately its making extremely bad contact and only works with someting putting pressure on the leads. Annoying.

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.

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!

Using with 12v fan to silent a very noisy network switch. Works great and has been working great for over a month now, no issues and good build quality.

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

Took off side panel of PC to vaccuum and blow out. The side panel fan connector came off...and could not find it. It was a 3 or 2 pin male connector. This inexpensive connector with 3 pin female went into an open USB port on back of PC. Came through the side panel back left corner, not drilling required. EZ solution, and the original an still works, so returned the fans I ordered.

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.