A crucial safety investment for any pool owner, the Poolwatch Immersion Alarm System works with both above-ground and in-ground pools providing peace of mind and ensuring the safety of swimmers. Designed to make your swimming environment safer for your family, guests, and pets, this pool alarm is triggered when any object over 18-lbs is detected. Upon detection, the alarm is triggered, emitting a loud sound to alert nearby adults of the potential danger. For fewer false alarms, wind, rain, or light floating objects are not detected by the sensors. Please note: This is not a life-saving device and should not replace supervision or any other safety consideration. 3-year limited warranty.