CLEARANCE.. We bought shit loads and need it gone for space in the shop! Some are RAM , some are a different brand but works the same nonetheless... Probably from the same factory.:) 

No idea how we bought so fucking many of them.. But here we are. 

The simplest way to adjust and controls the speed of your AC fans. This then ensures a longer life of the fan motor.

It has variable speed control and full power and off and is suitable for up to 300 W.

Note: this type of fan controller is a resistance based controller. All resistance based controllers may cause a humming noise from AC extractor fans. EC fans do not have this issue and have much more capable controllers to reduce speeds with zero additional noise.