Best First Alert Times

First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White

FIRST ALERT Dual Sensor Smoke and Fire Alarm, SA3210 , White

FIRST ALERT SC9120B Corded Electric Combination Alarm with Adapter Plugs for Easy Replacement

First Alert SMCO100V-AC, Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup and Voice & Location Alerts, 3-Pack

First Alert SM210L, 10-Year Sealed Battery Smoke Alarm with Safety Path Light, 1-Pack

First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack

First Alert SMI100-AC, 9120B Replacement Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack

First Alert SMICO100, Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack

First Alert BRK 9120Bff-6 Hardwired Smoke Detector with Battery Backup, 6-Pack