Siterwell Carbon Monoxide Alarm, 10 Year Life CO Detector with LCD Digital Display and Sound Warning, UL Listed, CO Detector Battery Operated for Home School Office, 2-Pack - Walmart.com
First Alert Plug-in Carbon Monoxide Detector in the Carbon Monoxide Detectors department at Lowes.com
Kidde 10-Year Worry Free Smoke & Carbon Monoxide Detector, Lithium Battery Powered with Voice Alarm, 2-Pack 21029621 - The Home Depot