Features: * For 120, 240. and 277 vac baseboard heat systems * Provides double line break when positive off * 4 wire application * Dual diaphragm sensing for excellent temperature control * Power requirements include 60 Hz noninductive, 22A at 120 to 240 vac and 19A at 277 vac * Easy installation * UL listed What"s In The Box: * Honeywell CT410B Electric Heater Thermostat