Every Flood Buzz™ product works in the same basic way. When water from a leak touches the two metal prongs on the bottom of a Flood Buzz™ water leak alarm, the water closes the circuit and the Flood Buzz™ emits a loud piercing screech. There are no moving parts, no extra components to break, nothing unnecessary. Just a lean, mean, water leak-detecting machine that will save you from the damaging and expensive consequences of undetected water leaks.