First Alert SC7010B Hardwired Photoelectric Smoke/Carbon Monoxide Alarm
AC Hardwired Interconnect Smoke Alarm with Hush i12040 | Kidde
Kidde FYCO3IN Hard Wired CO Detector with Battery Backup
First Alert Hardwired Smoke Alarm with Battery Backup 2 PACK - Walmart.com
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