Be alerted to the type of danger and its location in your home with the SMCO100V-AC interconnect hardwire combination smoke and carbon monoxide alarm. Features battery backup as well as voice and location alerts. Easy to install using the quick connect plug. Plus interconnect compatible alarms to create a whole home alarm system to help provide an early warning. Also equipped with First Alert's Precision Detection advanced sensing technology and meets industry standards. 10-year limited warranty.