Review on AC Infinity Fan Speed Controller: Ideal for DIY Cooling Ventilation with Axial Muffin Cooling Fans (100-125V AC) by Jack Collins

I paid 2 prices 14.99 and 13.99. I found it a lot for this item (2 star price reduction). The review I read said a dual controller (2 fans) was included with each fan, they are NOT included. I paid almost as much for the controller as I did for each fan. Later, 5 fans and 5 controllers cost me about $150 or more. They are made of plastic (1 star off for materials). I put 2 types (transparent and black) non-slip rubber feet (sold separately) on the fans to put them on the big amps and components, and then mounted the 5 controllers on the back. Cabinet for equipment (4 shown in the photo). The low speed reduces the noise significantly and is absolutely necessary when the volume is low, especially when 5 fans are running all the time. Hope that helps.