This alarm is for in ground pools up to 18" x 36" in size * Comes with both poolside and in-home remote alarms and a poolside air/water temperature monitor * Stainless steel deck mounting system and ladder mounting system included, 120 decibel alarm siren at poolside, 95 decibels at 10ft * 2 thermostats for monitoring both water and air temperature * Alarm remote uses AC power adapter (UL/CSA Listed) and back-up 9 Volt battery (not included) for remote