The First Alert BRK SC9120B is a highly effective safety device that combines an 85-decibel ionization smoke detector with an electrochemical carbon monoxide sensor. This hardwired unit features an intelligent sensing technology system that minimizes false alarms while providing reliable protection. The latching alarm indication helps identify which unit in an interconnected series caused the alarm, as the triggering unit's red LED indicator will flash rapidly, making it easy to pinpoint the source. Once the alarm condition is resolved, the initiating unit will remember the event and flash its LED indicator in a 2-second on, 2-second off pattern for easy reference.

Installation of the First Alert BRK SC9120B is straightforward and convenient. Its Perfect Mount system includes a gasketless base and a mounting bracket that ensures the alarm remains secure and aligned, no matter the installation angle. This product also includes a dust cover to keep the alarm clean during construction and keyhole slots in the mounting bracket, which allow for easy placement without needing to undo electrical box screws. Two locking features enhance security, preventing theft of both the battery and the unit itself. The connection to AC power is facilitated through a quick-connect wiring harness, ensuring a quick, easy, and cost-effective installation process. With these advanced features, this smoke and carbon monoxide detector is designed to offer reliable protection for your home or business.