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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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First Alert SCO2B Battery Operated Smoke & Carbon Monoxide Combo Alarm: Carbon Monoxide & Smoke Detectors (029054000897-2)
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First Alert Battery-operated Ionization Sensor Smoke Detector in the Smoke Detectors department at Lowes.com
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