The First alert SMCO210 Sealed 10-Year Battery Combo Smoke and CO Alarm with Slim Profile Design 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.

• 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 in an easy to install detector
• 10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
• End-of-life warning lets you know when it’s time to replace the alarm
• Slim profile design is half the depth of a standard alarm
• Test/silence button for efficient testing to ensure detector is working properly