The Sonin 00700 Water Alarm with Remote Sensor detects leaks and sounds alarm. For early warning of leaks that may cause damage. Although it will not stop leaks, it is an early warning that leaks need tending. It gives you time to move valuables out of the path of the leak. Helps protect against costly water damage. Warns of leaks and overflows in bath, kitchen, laundry, furnace or computer rooms. Alerts user within hearing range that water has reached desired level when used to monitor the filling of pools, tubs, sinks, aquariums and more. An ideal accessory for sump and bilge pumps in residential, commercial and marine applications. Requires one 9-Volt battery (not included). One year limited warranty.