Leak Frog LF001 Water Alarm, Protect your home from potential leaks, mold, and damage. 2 Pack Protect your home from potential leaks, mold, and damage No installation required, simply place by the water source When water starts to puddle, even if its only 1/32 inch of water, LeakFrog sets off its alarm to alert you Loud alarm sound for no-fail alert when potential water damage is present 2 pack with 6 AAA batteries