First Alert BRK SC9120FF Hardwired Smoke & CO Detector with Battery Backup

Overview

The First Alert BRK SC9120FF combines smoke and carbon monoxide detection in a single hardwired unit, designed for homes that want reliable, 24/7 monitoring. It remains vigilant during power outages thanks to a built-in 9-volt battery backup, and it plugs into standard 120-volt wiring for a seamless install. UL 2034 listing and a 10-year warranty reflect a long-term safety mindset, while simple operation helps busy households stay informed without extra fuss.

Interconnected Protection

• When one detector senses smoke or CO, all compatible devices in the network sound together, helping you respond quickly.
• LED indicators and an 85 dB siren provide clear, audible and visual alerts throughout the home.
• A latching alarm indicator identifies which unit triggered the alarm for easier follow-up.
• The design includes tamper-resistant mounting brackets and a battery drawer lock for added security.

Key Features

• Easy installation with a quick plug-in power connector; no special tools required for initial setup.
• Interconnects with up to 18 compatible devices to help ensure synchronized alerts across the home.
• Single test/silence button with automatic internal self-test for routine checks and reliability.
• Electrochemical CO sensing paired with a smoke detection method for dual-threat coverage.
• Indicator lights and a loud siren provide immediate, actionable warnings.
• Tamper-resistant locking brackets and universal mounting brackets simplify secure placement.
• Includes 9V backup battery, user manual, and a straightforward installation kit.
• UL Safety Standard 2034 listed with a 10-year limited warranty for peace of mind.

What to Expect During Installation

Plan placement according to local codes and the layout of living spaces. Use the quick plug-in connector for power, install the included mounting hardware, insert the 9V battery for backup, and perform a full test with the unit’s single button to confirm operation.

Real-World Scenarios

In homes with gas appliances or fireplaces, having a combined smoke and CO detector helps provide a single, easy-to-monitor alert point. Interconnected devices increase situational awareness across multiple rooms, while tamper-resistant hardware adds a layer of security for rentals or high-traffic areas. The battery Backup keeps monitoring active if a power outage occurs, allowing you to respond with confidence.