The HomeSitter™ Dialer remote temperature monitoring system automatically calls out to notify you if there is a drop in temperature (below 45°F/7°C) or a rise in temperature (above 85°F/29°C). This temperature alarm feature can help you prevent frozen/burst pipes due to furnace failure or prevent mildew and humidity damage when an air conditioner stops working in the summertime heat. The unit comes with a water sensor that can be placed near a water heater, behind a washing machine or in a sump to warn you if water is detected. The unit can accept an unlimited number of water sensors. Model WS-600E.