Speed Control, Rotary, Adjustable, Voltage 120V, Max. Amps 12 A, Switch Color Black/Gold, Plate Color Black/Silver, Height (In.) 4 1/2 in, Width (In.) 4 1/2 in, Depth (In.) 1 1/4 in, Fits Single Gang Box, For Use With Dayton and Other Compatible Speed Controllable Ventilators and Fans, UL Component Recognized, Includes Mounting Screws and Wire Nuts