Swim Time Poolwatch Pool Alarm System: * Electronic sensor detects entry into pool by children, pets or intruders * Remote receiver sounds when the pool alarm is activated; 100" wireless range * Alarm is designed to detect objects weighing 18 lbs or more * NSF Certified to ASTM F2208 requirements for pool alarms * 110V A/C or 9V battery powered receiver * Pool Sensor requires 6 D batteries (not included)