First Alert 1039796 Ionization Smoke Alarm

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Model number SA303CN;
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Alarm excels at detecting smoke from flaming fires;
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Ionization smoke-sensing technology with enhanced smoke-gathering design ;
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Loud 85dB alarm is designed to be heard easily ;
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Features single test/silence button for simple operation ;
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Side-load battery compartment & theft-prevention lock;
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Includes mounting bracket & 9V battery;