FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White - Amazon.com
First Alert SA521CN-3ST Wireless Interconnect Hardwired Smoke Alarm
Kidde AC Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert at Lowes.com
7 Best Smart Smoke Carbon Monoxide Detectors and Monitors of 2023 - Reviewed
Kidde 10 Year Worry-Free Hardwired Combination Smoke and Carbon Monoxide Detector with Wire-Free Voice Interconnect 21028759 - The Home Depot
Kidde P4010ACSCOAQ-WF Hardwired Intelligent Wireless Smoke + Carbon Monoxide Smart Alarm with Indoor Air Quality Monitor | BuyRite Electric
X-Sense 2-in-1 Smoke and Carbon Monoxide Detector Alarm (Not Hardwired), 10-Year Battery-Operated Dual Sensor Fire & CO Alarm, Compliant with UL 217 & UL 2034 Standards, SC06 - Amazon.com
Kidde Combo photoelectric smoke/C0 alarm going off every hour… will beep twice. Say fire twice. Beep again. Then stop. : r/firealarms
First Alert Hardwired 120V Electrochemical/Ionization Carbon Monoxide and Smoke Alarm - Carr Hardware