The LUPUSEC-XT Water Sensor triggers a build-in alarm as well as an alarm signal to the main unit. Two types of detection probes are provided for wall mounting or ground deployment. The wireless water sensor, designed to detect and prevent water damage in your vicinity makes your home a much safer place to live. Furthermore the Motion Detector is connectable to the Smart-Home functions of the LUPUSSEC-XT Alarm System. The XT-1 is capable to work with up to 20 sensors and the XT-2 with up to 160. All sensors are long life battery powered and wireless connected to the main unit. So there is absolutely NO need for any wiring!