The Sonin 00800 Water Alarm with Remote Sensor helps protect your home or business from costly water damage that may otherwise go unnoticed, Detects water and sounds a loud 85dB alarm, 2 Remote sensors doubles the coverage area with suction cup and adhesive, May be placed up to 6 feet away from the alarm unit, Alarm unit is wall mountable (hardware not included), Convenient test button and low batter alarm, Requires one 9 volt battery (not included), Pack of 2 SKU: SNIN007