Be alerted to the type of danger and its location in your home with First Alert's SMCO210V 10-Year Sealed Battery Combination Smoke and Carbon Monoxide Alarm with Voice and Location Alerts. This 2-in-1 alarm provides convenient protection against both CO and fire threats and meets new industry standards. 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.