First Alert 2-Pack Battery-operated Ionization Sensor Smoke Detector

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These First Alert battery operated smoke alarms are designed to be easy to install, and easy to maintain with a hinged cover for easy battery replacement. The alarms are equipped w ith an ionization sensor designed to reliably detect particles from fast-flaming fires. 9-Volt battery-operated smoke alarm Hinged cover for easy battery replacement Test button helps ensure your alarm is working properly Batteries should be changed every six months Show more