First Alert SC-9120B hardwired smoke and CO alarm with battery backup provides continuous protection.

First Alert

First Alert SC-9120B Hardwired Smoke & CO Alarm 2-Pack

High-performance tools and home improvement made for confident daily results

$148.89

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Why customers choose TaskHolt Tools

Overview

The First Alert SC-9120B is a dependable hardwired dual-sensor alarm designed for a typical single-family home. This 2-pack combines an electrochemical carbon monoxide sensor with an ionization-based smoke sensor, delivering clear alerts for two common household dangers without needing constant replacement.

Reliable power and smart integration

Enjoy steady monitoring thanks to a built-in battery backup that keeps the system active even during power outages. When paired with other BRK or First Alert hardwired CO smoke detectors, these devices can interconnect to provide coordinated alerts across your home, helping you respond quickly in multiple rooms.

  • Hardwired operation with battery backup for continuous coverage
  • Interconnects with compatible BRK/First Alert detectors in a single-family home
  • Distinct indicator lights show whether the trigger is smoke or CO
  • Side-load battery compartment for straightforward maintenance
  • Single test/silence button for simple operation

Real-life use and thoughtful placement

Imagine placing these alarms in hallways near sleeping areas or living spaces where family members spend time. The dual-sensor design helps differentiate triggers, reducing confusion during an alarm and allowing a calm, informed response.

Key benefits you can expect

  • Constant monitoring powered by the hardwired connection with a backup battery
  • Wider coverage when installed in multiple rooms via interconnection
  • Clear, quick identification of smoke versus CO signals through LED lights
  • Effortless maintenance with a side-load battery compartment
  • One-button test and silence for convenient routine checks

What’s in the 2-pack

Two alarms ready to install in strategic spots to help create a safer home environment. Each unit works with compatible BRK or First Alert hardwired networks for cohesive protection across living areas.

Note: This description emphasizes the notable benefits shown in the product data and is intended to support a thoughtful safety plan without asserting guarantees.

FAQ

Q: Can the First Alert SC-9120B be interconnected with other detectors?

A: Yes. It interconnects with compatible BRK or First Alert hardwired CO smoke detectors in a single-family home.

Q: What happens during a power outage?

A: Battery backup keeps monitoring active, so smoke and CO alerts can still occur if power is out.

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