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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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P4010ACLEDS-2 is an AC powered, ionization smoke alarm that operates on a 120V power source with sealed-in lithium battery backup.
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Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot
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How to Install Hard Wired Smoke Detector - Easy Installation First Alert Smoke Detector Model 9120B - YouTube
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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 Hardwired Smoke Detector Alarm with Light and Battery Backup, Battery Included, Interconnectable - Commercial Lighted Exit Signs - Amazon.com
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electrical - Can you run an individual wire to link smoke detector together? - Home Improvement Stack Exchange
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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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Kidde Smoke Detector, Hardwired Smoke Alarm with 9-Volt Battery Backup, Test-Reset Button, Interconnect Capability - Amazon.com
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