Flood Buzz Water Leak Detector Sounds Alarm (Set of 3) LOW-COST, LOUD AND EFFECTIVE water leak alarm designed to help mitigate damage and avoid the associated liabilities and legal exposure to landlords and management companies caused by water leaks. IMPORTANT TOOL to warn apartment dwellers, condo owners, managers and landlords of leak conditions so that they can be fixed before they become much costlier problems. NO BATTERIES REQUIRED. Lasts up to 3 years. SIMPLE INSTALLATION. Just place it and forget it. If water is present, a 110 dB alarm will sound. PERFECT for water heaters, laundry areas, under sinks, next to toilets, and near any suspected leak locations.