First Alert Carbon Monoxide and Smoke Detector (Combo Pack) - SCO403 (1039879)

First Alert Carbon Monoxide and Smoke Detector Combo Pack of the CO400 Battery Operated Carbon Monoxide Alarm and the SA303 Battery Operated Smoke

First Alert Smart ZCOMBO-G (1039833) Smoke & Carbon Monoxide Detectors Review - Consumer Reports

First Alert SCO403 Smoke and Carbon Monoxide Detector Combo Pack

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FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup. 3-Pack , White

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First Alert SCO403 Smoke and Carbon Monoxide Detector Combo Pack

UPC 029054019233 - 2 Pack CO & Smoke Alarm