First Alert Hard-Wired w/Battery Back-Up Ionization Smoke and Carbon Monoxide Detector

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 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 warningYou may also like First Alert SMCO500V Interconnect Battery-Operated 2-in-1 Smoke and CO Alarm with Voice and Location Alerts, 1048446.