The FFU Series Commercial Auto Off Timers Are Designed To Replace Any Standard Wall Switch. This Series Of Energy Efficient Mechanical Timers Do Not Require Electricity To Operate. The Commercial Brushed Metal Look Plastic Construction Meets Nec Requirements. In Addition, They Automatically Limit The On Times For Fans, Lighting, Motors, Heaters, And Other Energy Consuming Loads. Fits Standard 2 1/2 Deep Wall Box Single Or Multiple Ganging With Standard Wall plates Electrical Ratings: Resistive 20 Amps 125V 10 Amps 208/277V Tungsten 7Amp 125V Motor 1 Hp 120Vac, 60 Hz 2 Hp 250 Vac, 60 Hz Rugged Time Dial Plate Easily Withstands The Abuse Encountered In Commercial Environments Press On Knob Design Ensures Quick & Easy Installation 2.79 H X 1.6 W X 1.19 DMade in: United States Dimensions: 7 X 2.5 X 4Brand: Inerratic IncItem Weight: 0.301includes: Unit Instruction Guide