First Alert 9120B6CP Contractor Pack Smoke Alarm With Battery Back-Up Selling Unit: Each Features: * Multiple station smoke alarms specifically designed for residential and commercial use * Redesigned cover, metal sensing chamber and new integrated circuit work together to reduce nuisance alarms * Perfect mount system features a gasket less base and mounting bracket that keeps the alarm secure over a wide rotation range to allow for true alignment * Single button test and silence eliminates confusion * Meets UL standards with an 85dB horn * Easy access side-load battery drawer, installation and removal can occur while the unit is mounted to the ceiling or wall via the side load batter compartment * Battery backup power supply keeps alarm working during a power failure, providing battery is installed properly and is fresh * Contactor preferred features include a dust cover to keep alarm clean during constructio...
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