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

Hardwired photoelectric/CO combination alarm with voice meets new construction requirements for the state of Massachusetts and other states/counties that have similar requirements. 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" wiring harness. Installation is quick, easy and cost effective.