First Alert BRK 6-Pack Hardwired Combination Smoke and Carbon Monoxide Detector 1046873

120V AC/DC Interconnectable Ionization Smoke & CO Alarm w/Replaceable Battery Backup (6 Pack) 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 Operating Manual PDF