Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display, Pack of 2
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Carbon Monoxide Detector & Smoke Alarm Combo, Dual Smoke and Carbon Monoxide Detector Battery Powered with LCD Display and Sound Warning for Home,Garage,Office (Batteries Not Included) -1 Pack - Amazon.com
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Kidde KN-COP-DP-10YH Hallway Plug-in Carbon Monoxide Alarm with Sealed Lithium Battery Backup | BuyRite Electric