An alarm system is an important piece of equipment to install on your pool. It will keep your family and pets safe and give you peace of mind. The PoolEye PE 22 is designed for in ground pools up to 18x36 ft., features 2 layers of protection, and an in home receiver. One, there is a Passive Infrared Motion (PIR) detector with a range of 180° and up to 50ft. so when this is breached, an in-home receiver announces "Check the pool", repeats 3 times, and then resets. Two, there is a Sub-Surface Wave Detector that sounds 95 dB at 10ft. at poolside if anything greater than 15 pounds drops in the pool. The in-home remote receiver sounds "Check the pool" when the first layer is breached, "Emergency! Check the pool!" when the second layer is breached, and "Check the battery" when the low-battery signal is received from the poolside unit. The system can be installed on the deck or mounted to a ladder and all stainless steel hardware is included.