First Alert 2-In-1 10-Year Battery Photoelectric Smoke & Carbon Monoxide Alarm

First Alert SMCO210 10-Year Battery 2-In-1 Photoelectric Smoke & Carbon Monoxide Alarm with Slim Profile. 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). The alarm is also equipped with a 10-year sealed battery to eliminate the need for battery replacements and low battery chirps.

• Precision Detection advanced sensing technology
• Slim profile design is half the depth of a standard alarm
• Provides reliable 2-in-1 protection against both smoke and carbon monoxide
• 10-year sealed battery
• End-of-life warning