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First Alert 9120B Hardwired Smoke Alarm With Battery Back Up: Fire & Smoke Alarms & Accessories (029054513014-1)
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Smoke Detector Installation Step by Step Instructions | How to Install Hardwired Smoke Detectors - Haas and Sons Electric
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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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