The Westek Indoor Mechanical Countdown Timer turns lights and motors off at selected times up to 60 minutes. It is easy to install in any single pole / single throw outlet and will replace any single gang switch. This Timer breaks the circuit at the end of the timing cycle to cut electrical power. The switch ratings are: 1 HP 125 VAC, 2HP 250 VAC, 20 Amp 125 VAC, 10 Amp 277 VAC, and 5Amp 125 VAC Tungsten.