The LR-HWLV-HVAC TouchPRO Wireless Touchscreen Thermostat is a 24 V 50/60 Hz 1 A product. It is suitable for gas, oil or electric heat with air conditioning, warm air, hot water, high efficiency furnaces, heat pumps, steam, gravity, heat only (including power to open and close zone valves (Series 20) and normally open zone valves), heat only with fan, cool only and 750 mV heating systems.