First Alert 9120B Hardwired Smoke Alarm with Battery Backup
Kidde 10 Year Worry-Free Smoke Detector, Lithium Battery Powered, Smoke Alarm, 3-Pack 21029885 - The Home Depot
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SITERWELL Smoke Detector Carbon Monoxide Detector Combo with Voice Speaker, Dual Sensor Fire and CO Alarm with LED Light & Test Button, Battery Operated, Auto-Check, UL 217 & UL 2034 Standards, 1
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FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Adapter Plugs for Easy Replacement , White - Amazon.com