9120 Collection 120 Volt Smoke Alarm with Single Button Test / Silence, Smart Technology, Latching Alarm Indicator, Perfect Alignment Mount and Dust Cover The 9120 Series smoke alarms have been designed to install faster, perform better and be even smarter than before. These improvements help reduce nuisance alarms and save you time and money. 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 Contactor preferred features include a dust cover to keep alarm clean during construction, keyhole slots in the mounting bracket eliminate the need to remove the junction box screws for installation, two locking features are provided to prevent battery theft and or theft of the unit and connection to AC power is made with a quick-connect wiring harness for installation that is quick and easy Specifications: Meets UL standards with an 85dB horn You can install BRK Brands, Inc. products with confidence! Our products are designed to save lives. Its a responsibility we dont take lightly. We build each smoke alarm, carbon monoxide alarm, heat alarm, and fire extinguisher to the highest standards. Over the years weve seen competitors come and go. Were still here, still making the most recognized consumer brands of smoke and CO alarms on the market.