First Alert Battery Combination Smoke & Carbon Monoxide Alarm

Price: $44.99 - $38.99
(as of Sep 26, 2026 00:14:58 UTC – Details)


Easily install the First Alert SMCO200 Battery-Operated Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design. The alarm is half the depth of a standard alarm and provides reliable 2-in-1 smoke and carbon monoxide protection. Meets new industry standards with First Alert’s Precision Detection advanced sensing technology.
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
Slim profile design is half the depth of a standard alarm
End-of-life warning lets you know when it’s time to replace the alarm
Battery-operated alarm is easy to install and maintain
Customers find the smoke and carbon monoxide alarm reliable, easy to install, and well-built, with one customer noting it works even during power outages. The product receives positive feedback for its quality and value, though opinions on durability are mixed, with several customers reporting it lasted only a year and nine months. The smoke and carbon monoxide protection features also receive mixed reviews, with some customers reporting random false alarms.