First Alert SC9120B Corded Smoke & CO Alarm with Adapter Plugs

Overview

Meet the First Alert SC9120B, a dual sensor hardwired alarm that combines reliable smoke detection with electrochemical carbon monoxide sensing. Designed for easy replacement in homes with existing wiring, it blends practical protection with user friendly operation. This unit aims to deliver clear alerts and straightforward daily use without feeling cumbersome in your routine.

Effortless installation and lasting protection

Replacement is simplified by adapter plugs and a quick connect wiring harness, so you can swap an older hardwired unit without rewiring. A built in 10 year battery backup keeps monitoring active during power outages, providing peace of mind when the power goes out and you need consistent coverage.

• Adapter plugs enable a quick, rewiring free replacement
• 10 year battery backup maintains monitoring during outages
• Combination smoke and CO sensing with intelligent detection helps manage nuisance alarms
• Face indicators show smoke or CO presence with a loud 85 dB siren for clear alerts

Smart features for everyday life

Daily use is simplified with a single test and silence button for quick checks and quieting alarms when appropriate. A latching alarm indicator reveals which detector triggered the alarm, even after conditions subside, and an end of life signal prompts timely replacement. The unit can be connected with compatible BRK or First Alert alarms in a single family residence, causing synchronized alerts across the home when needed.

• One button test and silence for easy maintenance
• Latching indicator identifies the initiating unit
• End of life signal signals when replacement is due
• UL tested and designed for seamless multi unit integration

In a typical home, placing one CO detector on each level and in sleeping areas helps create a coordinated safety network. The SC9120B is built to cooperate with other compatible alarms so you can rely on a unified alert system across bedrooms, living spaces, and kitchens. While performance depends on placement and maintenance, this model emphasizes practical, no hassle safety management that respects your daily life.

Note This device is designed to support early awareness and clear communication. For best results, follow placement guidelines and replace the unit as indicated by the end of life signal to maintain ongoing protection across your home.