ADT (Edwards) ADT-PS Fire Alarm Photoelectric Smoke Detector w/ SIGA-RB Base | eBay
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ADT Smoke Detectors & Smoke Alarms | 855-998-3025
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LSHOME 3 Pack Smoke Detector Fire Alarms 9V Battery Operated Photoelectric Sensor Easy to Install with Light Sound Warning, Test Button,9V Included Safety for Home Hotel(912-3) (GS528A) - Amazon.com