First Alert SM210 10-Year Battery Photoelectric Smoke Alarm with Slim Profile 2-Pack. Features First Alert's Precision Detection advance sensing technology and meets industry standards. This slim profile alarm is easy to install, and the 10-year sealed battery means no battery replacements are required.

• Precision Detection advanced sensing technology
• Complies with industry standards to reduce cooking nuisance alarms
• 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
• Slim profile design is half the depth of a standard alarm
• End-of-life warning lets you know when its time to replace the alarm
• Test/silence button for efficient testing to ensure alarm is working properly