This energy saving timer uses no electricity to operate. These timers are designed to replace any standard wall switch, single or multigang, and automatically limit the ON time of fans, lights, motors, heaters and other energy consuming loads. This Model can be set for up to 6 hours at a time. This commercial style configuration includes a metal switch plate, for added durability and visual appeal. An exclusive up front terminal connection with teeter type terminals and an easy presson knob design ensure quick and easy installation. Additional Information: