First Alert BRK 6-Pack Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert 1046780

120V AC/DC Interconnectable Smoke & CO Alarm w/Replaceable Battery Backup & Voice Warning w/Location (6 Pack) Precision Detection technology helps reduce cooking nuisance alarms and provides early warning. Voice & location alerts tell you what the danger is and its location Battery backup provides continuous protection during power outages Test/Silence button allows for efficient testing and temporarily silences alarm for up to 8 hours Interconnects with most First Alert and BRK alarms so when one sounds, all compatible alarms sound to provide an early warning Provides reliable 2-in-1 protection against both smoke and carbon monoxide Operating Manual PDF