Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot
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How To Install a Smoke Detector - The Home Depot
First Alert BRK AC Hardwired Combination Smoke and Carbon Monoxide Det – Kings Outdoor Lighting
Universal Security Instruments 5304L Hardwired Ionization Smoke and Fire Alarm with Battery Backup
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First Alert BRK SA520B Hardwired Wireless Interconnect 120V AC/DC Smoke Alarm, Bridge Unit
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