The SW30MK 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 30 minutes. This unit is supplied with a molded gray wall plate. 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): 20A, 125 VAC, 10A 250/277VAC. Tungsten: 7A 125 VAC. Motor: 1 HP, 125VAC, 2 HP, 250VAC. 50/60 Hz.