First Alert BRK SC9120B-3 Hardwired Smoke and CO Detector – 3-Pack with Battery Backup

Overview

Protecting your home starts with reliable detection. The First Alert BRK SC9120B-3 3-pack delivers hardwired smoke and carbon monoxide detection with dependable battery backup. With three detectors in one bundle, you can extend coverage to key living areas, improving early warning without sacrificing ease of maintenance. The design emphasizes straightforward use, quick testing, and simple interconnection with compatible devices in the First Alert family.

What makes this 3-pack stand out

Designed to help you stay informed about evolving threats in your environment, these detectors pair a fast responding smoke sensor with a precise carbon monoxide sensor. Visual indicator lights let you know when smoke or CO is detected, while an 85 dB siren delivers a loud, immediate alert to occupants in multiple rooms. When connected to other BRK or First Alert detectors, all alarms sound together for synchronized warning across your home.

Key capabilities

• Hardwired operation with a built in battery backup for continuous monitoring during power outages
• Electrochemical carbon monoxide sensing technology alongside an ionization sensor for rapid threat detection
• Face indicators and an 85 decibel siren provide clear, multi room alerts
• Interconnects with other compatible BRK or First Alert detectors to ensure coordinated alarms
• Test and silence controls along with a side load battery compartment for easy maintenance
• Tamper resistant locking brackets and universal mounting brackets simplify installation
• Dust cover included to help protect the unit during installation or repainting

Installation and everyday use

• Easy mounting options suitable for bedrooms, hallways, and living areas
• Minimal maintenance with a single button to test the system and silence false alarms
• Interconnectivity ensures that a detected threat can alert everyone in the home
• Compact design helps the detectors blend with ceiling interiors while remaining highly effective

Real world scenarios

In routine days or during periods of busy family activity, these detectors provide timely warnings that allow you to take action without delay. The battery backup helps maintain protection when a brief power loss occurs, and interconnection offers a layer of reassurance across multiple rooms or floors.