First Alert PRC710A 10-Year Battery Operated Photoelectric Smoke and CO Alarm | First Alert-BRK-PRC710A | Emergency Lighting
Kidde Code One Carbon Monoxide Detector, Battery Powered, CO Detector 21029508 - The Home Depot
First Alert 10-Year Battery-Operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Siterlink Carbon Monoxide Detector, 10-Year Life Carbon Monoxide Alarm, Replaceable Battery CO Detector with LCD Digital Display and Test Button, 3 LED Lights CO Alarm for Home, GS828C-D, 2 Pack - Amazon.com