QAGGUM AC Motor Variable Speed Controller for Router Fan Electric Motor Rheostat, SCR Voltage Controller 120V 220V 15A 4000W Max

This worked fine for reducing the speed of my 2 fans. I used a power strip in the box and plugged the fans in power strip.

Definitely not 4000 watts as I had a 1650 watt item plugged into it. I lost control to the dial after about 10 minutes and then I shut off the power button and it didn’t shut off. It started smoking and it could have caught fire. The cord isn’t even rated for 1200 watts. I definitely would NOT recommend for anything above 1000 watts.

I use this on my exterior fan on my deck. The fan speed is too high and with this I can adjust the speed to where I like it.

Works well for my need, easy to use and sturdy enough build....of course there is this not-so-sweet spot where you go from low power and try to kick it up a hair, and it kicks up a hair (ok, an arm hair) length rather than thickness....not critical for me but I can see it being a problem for some applications.

Works perfectly on my duct blower.

Visually it's phenomenal... Layout is phenomenal.. ease of use is phenomenal.. but they clearly don't test them or check that wires are undamaged. First one had 2 damaged wires (which caused a short), a bad solder connection that fell apart and the voltage adjustment dial stopped working after 20 min... Replacement unit's dial lasted 5 min and quickly became too hot to touch. Great design but that doesn't matter if it doesn't work

Good variable speed controller for router or other single speed tools. Price is right. Would recommend.

I mounted this on a 36-inch utility floor fan. Excellent for reducing the speed so it doesn't overpower you while you are working. I hardly ever used the fan before I got this.