Elektronischer Wassermelder 1.Low battery alarm 2.Loud alarm 85dB at 10feet 3.Water resistant 4.Detachable water sensor Elektronischer Wassermelder BH-W312 is designed to protect your home from potential water flood damage by placing anywhere a potential water leak exists -- near or beneath sump pumps, plumbing, refrigerators, dishwashers, washing machines, sinks, water heaters, toilets, ...