The PoolGuard Inground pool alarm fills the need for better safety in pools. The alarm is completely portable and comes with an in-house remote receiver with an operating range up to 200 ft. Once installed, the Poolguard pool alarm cannot be deactivated; it is always in the alarm ready mode. Tamper proof, the alarm will sound when removed from the pool. When ready to use your pool, simply remove the alarm and put it into sleep mode. When returned to the pool, the Poolguard alarm will automatically wake-up and run a system test to ensure it is operating properly. The Poolguard poolside alarm works on a 9-volt battery (not included); with a battery life of approximately one year. Audible low battery indicator on both poolside alarm and in house remote receiver. Poolguard pool alarm has new sensing technology providing fewer false alarms due to rain or small objects. Specifically designed to detect intrusions of a child weighing 18 pounds and up. The Poolguard pool alarm can be used with a solar blanket and works on pools up to 20x40 or 800 sq. ft. Poolgurad alarms were tested and rated No.1 by Good Housekeeping Magazine and meet New York and ASTM pool alarm code standards.