First Alert SC9120LBL BRK Brands Hardwired Combo Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup | First Alert
First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
First Alert Brk 6-Pack Hardwired Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com