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First Alert Dual Sensor Smoke Alarm Help keep your family safe with this battery-operated smoke alarm; It requires no rewiring for installation and provides continuous monitoring even if there's a power failure. While all smoke alarms are designed to detect smoke, different sensing technologies react differently to certain types of fires. This alarm makes use of both ionization and photoelectric sensors to offer the earliest possible warning regardless of the type of fire. Good to Know To ensure complete protection make sure to place one on each level of your home and in each bedroom.
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