Kidde 10-Year Worry Free Smoke & Carbon Monoxide Detector, Lithium Battery Powered with Photoelectric Sensor and Voice Alarm 21030866 - The Home Depot
First Alert Battery-operated Smart Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Carbon Monoxide Detector | Portable CO Detector & Alarm with LCD Digital Display | Battery Powered | for Home Kitchen, Bedroom, RV and Cars | Professional-Grade Accuracy& Easy to Install - Amazon.com