The SMICO100-AC Interconnect Hardwire 2-in-1 Smoke & CO Alarm with Battery Backup utilizes First Alert's Precision Detection technology and meets new industry standards. Easily install and interconnect multiple alarms together to create an alarm system throughout your home.
- Precision Detection technology helps reduce cooking nuisance alarms and provides early warning. 
- Interconnects with most First Alert and BRK alarms so when one sounds, all compatible alarms sound to provide an early warning 
- Battery backup provides continuous protection during power outages 
- Perfect mount bracket keeps the alarm secure over a wide rotation range for ideal alignment and easy installation 
- Latching Alarm Indicator visually identifies the unit that initiated the alarm or low battery warning 
- Test/Silence button allows for efficient testing and temporarily silences alarm for up to 8 hours