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Amazon.com: Kidde Smoke Detector, Hardwired Smoke Alarm with Battery Backup, Front-Load Battery Door, Test-Silence Button, White
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Kidde Smoke Detector, Hardwired Smoke Alarm with 9-Volt Battery Backup, Test-Reset Button, Interconnect Capability, 2 Pack - Amazon.com
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Kidde Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm 21029877 - The Home Depot
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Kidde P4010ACS-W (21027320) Wire-Free Interconnected AC Hardwired Smoke Alarm, 10yr Sealed Lithium Battery, Photelectric Sensing | Capital Electric Supply
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