The Poolguard Pool Alarm, models PGA and PGRM-2 by PBM Industries Inc., is an in-ground pool alarm system that utilizes Negative Displacement Technology to detect intrusions into unsupervised pools. It is designed to sense entry by children or pets weighing 18 pounds or more. The alarm is NSF-certified to ASTM F2208 and meets NSF/ANSI 50 standards, additionally complying with state alarm codes in NY, CA, CT, FL, and TN. It features a tamper-proof design that sounds an alarm if the unit is removed from the pool, and an integrated 85 dB horn audible at 10 feet. A remote receiver with a 200 ft. range and 12-volt power supply provides an in-house alert, along with an audible low battery indicator. The poolside alarm unit operates on a 9V battery (not included) with an approximate one-year life. It is deck-mounted, compatible with in-ground pools up to 800 sq. ft. (e.g., 20 ft x 40 ft), and can be used with solar blankets. Key features include an auto wake-up/test function, a sleep mode for swimming, and advanced sensing technology to reduce false alarms from environmental factors. The unit is constructed from a sturdy UV-rated PVC material and comes with a 3-year manufacturer warranty.