First Alert 10-Year Battery Smoke Alarm, Dual Sensor

Price: $64.99 - $52.20
(as of Oct 04, 2026 02:48:49 UTC – Details)


The SM310 10-Year Sealed Battery Dual Sensor Smoke Alarm meets new industry standards featuring First Alert’s advance sensing technology and dual smoke sensors to provide reliable protection from fast flaming and slow smoldering fires.
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
10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
Dual sensors provide protection from fast flaming and slow smoldering fires
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when it’s time to replace the alarm
Customers find the smoke alarm reliable and easy to install, with one mentioning it fits perfectly on the old First Alert mount. The battery life receives mixed feedback, with some appreciating the 10-year battery while others find it overpriced. Customers have mixed opinions about the noise level, with some finding it irritating. The alarm is difficult to remove from its base.