First Alert 10-Year Battery Combination Smoke & Carbon Monoxide Alarm

Price: $59.99 - $36.99
(as of Sep 17, 2026 22:47:37 UTC – Details)


The First Alert SMCO210 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design uses First Alert’s Precision Detection advanced sensing technology and meets new industry standards. This 2-in-1 alarm provides convenient protection against both fire and carbon monoxide (CO). Also equipped with a 10-year sealed battery to eliminate the need for battery replacements and low battery chirps.
First Alert’s Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
Provides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install alarm
10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
End-of-life warning lets you know when it’s time to replace the alarm
Slim profile design is half the depth of a standard alarm
Customers find the smoke and carbon monoxide alarm easy to install and appreciate its 10-year battery life feature. However, the alarm’s reliability is concerning as it starts going off for no reason and malfunctions after 20 minutes. Moreover, customers report durability issues, with units failing within 10 months, and noise complaints about random beeping and shrieking alarms. Additionally, the remote control feature receives mixed feedback, with customers noting it’s too easy to deactivate permanently.