Vent-Axia Hi-Line Plus Reversible Ceiling Fan Controller gives extra flexibility to all Hi-Line Plus installations. Fan speeds can be selected to suit varying conditions. This is of particular benefit where mounting height is low. The controller is designed to be used with a single fan or up to 5 Hi-Line fans. The controller is infinitely variable, has solid state components, an insulated spindle, white cover plate and can be flush or surface mounted.