Interconnect multiple First Alert SMI105-AC Smoke Alarms together to help provide an early warning throughout your whole home and have peace of mind knowing the 10-year battery backup provides continuous protection in the event of a power outage.

• Sensor Type: Ionization
• Power Source: Hardwired
• Backup Battery Type: 10 year battery, Lithium Metal
• Hardwired Interconnectivity: Yes
• Warranty: 10 Years Limited