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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
First Alert 2-Pack Plug-in Carbon Monoxide Detector in the Carbon Monoxide Detectors department at Lowes.com
First Alert BRK SCO2B Smoke and Carbon Monoxide (CO) Detector with 9V Battery - Walmart.com
First Alert Carbon Monoxide Alarm explanation and un-boxing video - YouTube