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First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
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First Alert BRK Hardwired Smoke Alarm With LED Strobe Light and 10-Year Sealed Battery | Canadian Tire
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First Alert 10-Year Battery Hardwired Photoelectric Sensor Smoke Detector in the Smoke Detectors department at Lowes.com
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First Alert SC9120B Direct Wire Combination Smoke And Carbon Monoxide Detector, 120 Volt With 9 Volt Battery Back Up 2 Pack - Walmart.com
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First Alert smoke detector removed and there's still beeping at the hole in the ceiling! - Fire Alarm General Discussion - The Fire Panel Forums
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