First Alert BRK SC9120B-3 3-Pack Hardwired Smoke & CO Detector with Battery Backup | White

Smart protection for your home

Protect multiple spaces with a reliable trio of hardwired smoke and carbon monoxide detectors. Designed for overhead mounting and hard‑to‑reach locations, the rigid shaft and corrosion‑resistant coating help ensure precise installation and lasting durability. The 3‑pack provides broad coverage across bedrooms, hallways, and living areas, giving you peace of mind from a single purchase.

How it safeguards your space

The unit blends an electrochemical carbon monoxide sensor with an ionization sensor to cover a range of real‑world scenarios. If smoke or CO is detected, you’ll see informative indicator lights and hear a loud alert that expands across the home, helping occupants react quickly and calmly.

Key benefits at a glance

• Hardwired power with battery backup for continuous protection even during power outages
• Electrochemical CO sensing paired with ionization detection for broad coverage
• Indicator lights plus an 85‑decibel siren for clear, immediate notification
• Ability to connect with other BRK or First Alert detectors to synchronize alarms

Easy setup and everyday use

Installation is straightforward with a single test/silence button and a side‑load battery compartment. Tamper‑resistant locking brackets and universal mounting brackets simplify mounting on ceilings or walls. A dust cover helps keep sensors clean before use.

Networked safety and practical placement

When paired with compatible BRK and First Alert detectors, the alarms will sound collectively for comprehensive awareness. For best results, place detectors in high‑traffic or hard‑to‑reach areas where straight, precise drilling is easiest with a rigid shaft, and note that the device’s finish is designed to endure challenging environments.

Before you install

Plan placements where you can benefit from early detection—near sleeping areas, entryways, and main living spaces. The combo of CO and smoke sensing, plus visual and audible alerts, offers versatile, non‑medical safety cues that align with typical home monitoring needs.