The Intermatic FD12HC energy saving timer uses no electricity to operate. This timer is designed to replace any standard wall switch, single or multi-gang, and automatically limit the 'ON' time of fans, lights, motors, heaters and other energy consuming loads. Time limits of 5, 15, 30 and 60 minutes and 2, 4, 6 and 12 hours are available. The hold feature allows the user to override the automatic shut-off function for extended use of the loads required. It features a time saving up-front terminal connection with teeter type terminals and an easy press-on knob design ensure quick and easy installation.