Be alerted to the type of danger and its location in your home with the First Alert SMCO100V-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup and Voice & Location Alerts. Easily installed using the quick connect plug. Plus interconnect compatible alarms to create a whole home alarm system to help provide an early warning. Also, the alarm is also equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.