First Alert BRK SMI100-AC 6-Pack Hardwired Smoke Alarm with Battery Backup – Contractor Pack

Overview

Enhance home safety with the First Alert BRK SMI100-AC 6-pack, a reliable hardwired smoke alarm system designed for multi-level protection. Each unit runs on 120-volt wiring and includes a built-in 9-volt battery backup, ensuring continued monitoring even during a power outage. The detector uses an ionization sensor to respond quickly to fast flaming fires and emits a loud 85 decibel alarm when smoke is detected, helping occupants react promptly.

Why this setup stands out

Designed for whole-home coverage, this 6-pack is ideal for placing on every level and in sleeping areas. A single test/silence button makes routine checks straightforward, and the side-load battery drawer lets you replace power then continue monitoring without dismounting the unit. In addition, the latching alarm indicator clearly shows which unit triggered the alarm once conditions have subsided, while an end-of-life signal alerts you when a replacement is due. The system can link with compatible BRK or First Alert detectors so all alarms sound in unison when smoke is detected.

Key benefits for your space

• High-sensitivity ionization sensor paired with an 85 dB siren for rapid alerts
• Battery backup sustains protection during outages, keeping vigilance active
• One-button test and silence simplifies maintenance and reduces false alarms
• Latching indicator helps identify the responsible unit after an event
• End-of-life signal prompts timely replacement for ongoing safety
• Easy installation with universal mounting brackets and tamper-resistant options

What you get and installation tips

Included in the contractor pack are six reliable alarms ready to be wired into your home’s electrical system. To maximize protection, install one on each level and in each bedroom. When wiring, confirm polarity and secure all connections—loose neutrals can cause malfunctions. For maintenance, use the accessible battery drawer to replace power sources without removing the unit. This setup is known for fast turnaround on job sites and is compatible with other BRK or First Alert detectors to unify your safety network.

Important notes

Always follow local electrical codes and manufacturer guidance during installation. This product is designed for residential use and is UL-tested to meet safety standards. Regular testing and replacement according to the life indicator will help maintain alertness in your home.