Best First Alert Smoke Detectors

FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button

Kidde 5CO Battery Powered Carbon Monoxide Alarm 10 Year Life

FireAngel Optical Smoke Alarm 2-Pack - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White

Wireless Interlinked Smoke, Heat & Carbon Monoxide Alarm Bundle | Scotland & England Law Compliant | 10 Year Battery Life | CE & BS Certified | LINKD Alarms | Pre Linked | UK Phone & Email Support

Google Nest Protect - Smoke Alarm And Carbon Monoxide Detector (Wired)

Kidde 2030-DCR Compact 10 Year Life Carbon Monoxide Alarm with AA batteries

FireAngel Optical Smoke Alarm - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White

FireAngel FP2620W2-R Pro Connected Smart Smoke Alarm for Home -10-Year Life. Battery-Powered, Wireless, Interlinked Smoke Detector - 1-Pack

Kidde 10SCO Combination 10 Year Life Carbon Monoxide and Smoke Alarm (1)

Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with Test/Silence Button,Carbon-Monoxide-Detector Comforms to EN 50291 Standard