9120 Collection Contractor Pack 120 Volt Hardwired Smoke Alarm with Battery Back Up, Latching Alarm Indicator, Smart Technology, Perfect Alignment Mount The 9120 Series smoke detector have been developed to set up much faster, carry out better and be even smarter than before. These improvements help in reducing annoyance alarms and conserve you money and time. Features: Multiple station smoke detector particularly developed for property and commercial usage Redesigned cover, metal noticing chamber and brand-new integrated circuit work together to reduce annoyance alarms Perfect mount system features a gasket less base and installing bracket that keeps the alarm safe over a large rotation variety to enable true positioning Single button test and silence removes confusion Easy access side-load battery drawer, installation and removal can happen while the system is mounted to the ceiling or wall by means of the side load batter compartment Battery backup power supply keeps alarm working during a power failure, providing battery is set up correctly and is fresh battery theft and or theft of the system and connection to Air Conditioner power is made with a quick-connect wiring harness for installation that is fast and easy 9 volt battery consisted of Specifications: Meets UL standards with an 85dB horn You can set up BRK Brands, Inc. products with confidence! Our products are developed to conserve lives. It's a duty we do not ignore. We develop each smoke detector, carbon monoxide gas alarm, heat alarm, and fire extinguisher to the highest standards. Over the years we've seen rivals reoccur. We're still here, still making the most acknowledged consumer brand names of smoke and CO alarms on the market.