Best First Alert Smoke Detectors

FIRST ALERT Plug-In Carbon Monoxide Detector with Battery Backup, (Pack of 3), CO605

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

FIRST ALERT BRK SC7010BV-3 Hardwired Talking Photoelectric Smoke and Carbon Monoxide (CO) Detector, 3-Pack , White

First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack

First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack

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

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

First Alert SMICO105-AC, Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup, 3-Pack

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

First Alert BRK 7010BFF-3 Hardwired Smoke Detector with Photoelectric Sensor and Battery Backup, 3-Pack , White