Protect your home from internal water damage with the FortrezZ Flood and Temperature Sensor. Aging and faulty appliances, corroded water heaters, fixtures in bathrooms and laundry rooms can all cause expensive water damage in the home. The Flood and Temperature Sensor alerts you when it gets wet. Just simply place on the floor near water using appliances and fixtures such as dishwashers, toilets, and washing machines. When paired with Nexia and an automated water shut-off valve, it will signal the valve to automatically turn off the water supply, eliminating any further damage from occurring. Sensor also monitors temperature to detect freezing conditions and even high heat in case of a fire. Small size fits in the palm of your hand. 2 x AA Alkaline batteries last up to 2 years.