The SW12HWK is a single pole, single throw energy saving timer that uses no electricity to operate. 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. Has a time limit of 12 hours. This unit is supplied with a molded white time dial plate which is designed to fit either toggle or decorator style switch plates; single or multi-gang. No field modifications are required to fit either style switch plate. Wall plate sold separately. An exclusive up front terminal connection with teeter type terminals and an easy press-on knob design ensure quick and easy installation. CSA certified. Resistive (heater): 20 Amp, 125 VAC, 10 Amp 250/277 VAC. Tungsten: 7A 125 VAC. Motor: 1 HP, 125 VAC, 2 HP, 250 VAC. 50/60 Hz. Color: White/Plastic.