Carbon Monoxide Detector,CO Gas Monitor Alarm Detector Battery Powered Complies with UL 2034 Standards,CO Alarm Detector with LCD Digital Display and Sound Warning for Home,Office - Amazon.com
HDX D Alkaline Battery (12-Pack) 7111-12PDQ - The Home Depot
X-Sense 10-Year Battery Smoke and Carbon Monoxide Detector with LCD Display, Dual Sensor Smoke and CO Alarm Complies with UL 217 & UL 2034 Standards, Auto-Check, SC08, 5-Pack - Amazon.com