LeakFrog is a small water alarm and sounds its alarm at the first sign of a leak. Simply place LeakFrog in the areas where leaks or water over-flow might occur. When water starts to puddle, even if it’s only 1/32 inch of water, LeakFrog sets off its alarm to alert you. If no one is home, the alarm will continue to sound for hours until you return. Leakfrog works best on floors of wood, tile, metal or concrete.