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First Alert 10-Year Battery-Operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
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First Alert BRK FG250B Dual Ionization Smoke Alarm with 9-Volt Battery, 1", White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
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Amazon.com: First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB : Everything Else
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