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Amazon.com: First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB : Everything Else
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Amazon.com: First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB : Everything Else
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FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White - Amazon.com
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