Gebildet 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable with Switch and Speed Regulator

Works like it supposed to. I really like convenience of using an external fan with a usb and being able to adjust rpm. I would have preferred a slightly longer cable, but this works just fine.

Works great for my little 120mm desk fan kit so far, appreciate the speed control dial.

Seems to work well.... will see how long it last. Overall happy!

I eanted it to test computer fans before I installed them to see how quiet and fan output. It's perfect. It also showed me how the fan would respond at different speeds. must have for computer builders, many other uses too. Now I'll use it for soldering to use an old computer fan to blow away smoke, very useful. invent your own uses

Works great. Have used it for a while now and for multiple set ups from testing pc components, running a fan on my desk, or using it to test automotive electrical components.

Plug and play. Works with 3 or 4 pin fans.

I use this to provide external power to a 4 pin fan contained in a ventobox 3d printing air filtration unit. Wiring up the red and black wires on the fan allows it to run at full speed. This cable is a good value and does exactly what it should.

This fan adapter works with a 4-pin PWM fan I connected to a USB port, but the switch and fan control housing buzzes as soon as it's switched on. The noise gets louder as the fan spin gets faster. It works, but I'm not a fan of the noise

Den gör jobbet som den skall

Provato con una ventola da 12v e funziona perfettamente, anche il regolatore permettette di regolare l'intensità. Sono soddisfatto

Works like a charm!

Me permet d'utiliser un ventilateur de boîtier PC sur une pris USB. Dans mon cas pour refroidir un appareil qui chauffe un peu trop. Fonctionne parfaitement bien comme espéré.

Works like a charm. Smooth variable speed control. Just buy!