First Alert Battery-Operated Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Smoke and Carbon Monoxide Detector Combo Unit Battery Operated Smoke Co Alarm With Self Test Button - Amazon.com
Combination Smoke & Gas Alarms by USI - Smoke, CO & Gas Detection
Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm - Amazon.com
First Alert Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com