First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
First Alert BRK 7010B Hardwired Photoelectric Smoke Alarm with Battery Backup, White - Walmart.com
First Alert Battery-operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
First Alert SA303CN3 Battery Powered Ionization Smoke Alarm with Test/Silence Button , White - Smoke Detectors - Amazon.com
BRK Electronics First Alert 7030BSL 120V AC/DC Hardwired Smoke & Carbon Monoxide Alarm with LED Strobe and 10-Year Sealed Lithium Battery Backup