First Alert SC7010B Hardwired Photoelectric Smoke/Carbon Monoxide Alarm
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
First Alert 7030BSL Hardwired Smoke & CO Alarm with LED Strobe Light (1038870)
First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB - Combination Smoke Carbon Monoxide Detectors - Amazon.com
2 In 1 Smoke and Carbon Monoxide Detector, Combination Smoke & CO Alarm With LCD Display LED Lights and Sound Alert,Fire Protect - AliExpress
Aico Ei3028 Mains Interlinked Heat & CO Alarm - Screwfix
Kidde 10 Year Worry-Free Hardwired Combination Smoke and Carbon Monoxide Detector with Wire-Free Voice Interconnect 21028759 - The Home Depot
First Alert SCO5CN Battery Operated Combination Smoke and Carbon Monoxide Alarm
Ei3028 Multi-Sensor Heat & CO Alarm | Aico
Are your CO, heat and smoke alarms in date? An expert's guide