First Alert SMCO210 Sealed 10-Year Battery Combo Smoke and Carbon Monoxide Detector with Slim Profile Design

Price: $54.94 - $49.80
(as of Oct 05, 2026 21:40:54 UTC – Details)


First Alert SMCO210 Sealed 10-Year Battery Combo Smoke and Carbon Monoxide Detector with Slim Profile Design
Reliable Detector: The First Alert SMCO210 Sealed 10-Year Battery Combo Smoke and CO alarm provides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install detector
Special 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
Long-Lasting Battery: 10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
Replacement Alert: End-of-life warning lets you know when it’s time to replace the alarm
Design: Slim profile design is half the depth of a standard alarm
Customers find the smoke and carbon monoxide detector functions well and is easy to install. The battery life receives positive feedback, with one customer noting it’s long-lasting. However, reliability and value for money receive mixed reviews – while some say it works well, others report false alarms, and while some consider it good value, others find it overpriced.