The Fibaro Flood Sensor is a water leak and temperature sensor. The device can be battery operated (included, nominal 2 years) or powered by a 12-24VDC power source (not included). The device is designed to be placed on the floor or on a wall with a flood sensor probe extended by wire. It has a built in LED indicator and acoustic alarm. In addition, the sensor is equipped with a tilt sensor reporting tilt or movement to the main controller if someone has taken the Sensor from its original location.