Dometic Atwood 38453 RV Furnace Temp. Control Thermostat – WhiteThis is a basic heat-only RV furnace thermostat. It senses the room temperature and automatically opens or closes two electrical circuits that send 12V DC power to your furnace. The base mounts to the wall with two screws. Leveling is not required for the unit to function correctly. The system wiring is connected to the thermostat with two screws provided on the back of the base.Additional InfoModel No.HFH-2000Dimensions3 “H x 3 “W x 1 “DPower Source12V DCApplication2-Wire Heating OnlyTemperature Range50F to 90FTemperature Differential4FNon-ReturnablePlease keep in mind this is an electrical component, per Panther RV Products return policy, this product is non-returnable.