BRK Electronics First Alert 7010B 120V AC/DC Hardwired with 9V Battery Backup Photoelectric Smoke Alarm (Upgraded to SM100V-AC)

Hardwired smoke alarm with battery back-up meets codes where a photoelectric smoke sensor is required for new construction. Photoelectric smoke sensing technology Single button test/silence 9V Battery Backup Optipath 360 TechnologyTM - patented technology provides 360 degrees of direct access to the smoke sensor. Perfect Mount - allows for easy alignment of alarm Dust Cover Easy Installation/Maintenance - Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. A battery pull tab keeps the battery fresh until the home is occupied. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the side load battery compartment. Two locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a "Quick-Connect" wi