24/7 alarm complies with ASTM F2208 at an unbeatable price. The Poolwatch Pool Alarm System works with both above-ground and in-ground pools to provide you with an efficient yet trouble-free solution to pool security. Quick, easy installation onto deck or pool rail. 1 year limited warranty. 110V AC powered receiver (with 9v battery backup; battery not included) Six (6) D size batteries (not included) for sensor