First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location - Combination Smoke Carbon Monoxide Detectors - Amazon.com
First Alert BRK SCO2B Smoke and Carbon Monoxide (CO) Detector with 9V Battery , White, 1 Pack - Combination Smoke Carbon Monoxide Detectors - Amazon.com
FIRST ALERT SCO5CN Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated and FIRST ALERT SA320FF Dual-Sensor Smoke and Fire Alarm, Battery Powered, Frustration-Free Packaging - Amazon.com
Amazon.com: Onelink by FIRST ALERT Smoke Detector and Carbon Monoxide Detector | Hardwired | First Alert
First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White & BRK 9120B6CP Hardwired Smoke Alarm with Backup Battery, 6-Pack - Amazon.com
Amazon.com: First Alert Onelink Safe & Sound - Battery Powered Smart Hardwired Smoke + Carbon Monoxide Alarm and Premium Home Speaker with Amazon Alexa
First Alert Hard-Wired w/Battery Back-up Ionization Heat Alarm - Amazon.com
First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack - Amazon.com
First Alert BRK 3120B Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup, Dual Sensing Smoke Alarm, 1-Pack - Amazon.com
First Alert SCO7CN Combination Smoke and Carbon Monoxide Detector with Voice and Location, Battery Operated , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com