First Alert Battery Combination Smoke & Carbon Monoxide Alarm

Price: $118.04
(as of Sep 19, 2026 23:26:05 UTC – Details)


The First Alert SMICO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm is equipped with First Alert’s Precision Detection advanced sensing technology and meets new industry standards. This 2-in-1 smoke and carbon monoxide alarm provides reliable protection against both threats and is easy to install and maintain.
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
End-of-life warning lets you know when it’s time to replace the alarm
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
Customers find the smoke and carbon monoxide alarm to be of good quality and appreciate having both detectors in one unit. However, the alarm’s reliability is mixed, with some saying it works well while others report it goes off frequently. Moreover, the value for money receives mixed feedback, with some finding it excellent while others say it’s not worth the higher price. Additionally, the connectivity and battery life aspects are problematic, as the device is only battery-operated and doesn’t come with proper connectors. The fit and durability also receive mixed reviews, with some saying it fits right where needed while others report compatibility issues with First Alert ZCombo Alarm base, and some units lasting many years while others only lasted four months.