First Alert SMI100-AC interconnect setup enabling whole-home early warning
First Alert SMI100-AC battery backup provides continuous protection during power outages
First Alert SMI100-AC precision detection for accurate fire sensing

First Alert

First Alert SMI100-AC Hardwire Interconnect Smoke Alarm with Battery Backup – 1 Pack

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

$28.50

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Why customers choose TaskHolt Tools

Smart sensing for safer, smarter homes

The First Alert SMI100-AC hardwire interconnect smoke alarm brings next‑level protection to modern living spaces. Built with Precision Detection technology, it helps reduce cooking nuisance alarms while delivering early warning when a real fire event occurs. The unit is designed to meet current industry standards, combining reliability with simple, retrofit-friendly installation.

Placement in a whole-home system is seamless thanks to interconnect capability. When one alarm detects smoke, all compatible alarms sound together, creating a coordinated alert that can help more people respond quickly. The SMI100-AC also includes a battery backup, ensuring continuous protection during power outages and giving you an extra layer of confidence when the lights go out.

For quick setup, this model uses a Quick Connect Plug, allowing easy installation with no rewiring required. A dedicated alarm indicator clearly identifies which unit initiated the alert, making it easier to verify and respond during an emergency.

What you gain in everyday use

  • Precision Detection reduces cooking and nuisance alarms while maintaining early fire warnings.
  • Interconnect functionality links compatible alarms for synchronized alerts across the home.
  • Battery backup keeps the system protected even when the power is off.
  • Clear visual indicator shows the initiating unit for faster response.
  • Quick Connect Plug enables straightforward installation with no rewiring needed.

Real-life scenarios and benefits

  • In a busy kitchen, the system aims to minimize false alarms while staying alert to genuine danger.
  • In multi-story homes, interconnection offers a coordinated warning that travels through the house.
  • During outages, battery power keeps the alarms active so you can hear a warning when it matters most.

Whether upgrading an existing system or building a new one, the SMI100-AC is designed to be a practical, reliable part of a home safety plan. While results can vary by environment, the combination of detection, interconnection, and backup power offers a thoughtful balance of protection and peace of mind.

FAQ

Q: What makes the First Alert SMI100-AC different from standard smoke alarms?

A: It uses Precision Detection to reduce nuisance alarms, interconnects with compatible units for early warning, and includes battery backup for continuous protection.

Q: Is installation difficult or does it require rewiring?

A: No rewiring is needed; the Quick Connect Plug enables easy installation and replacement of existing alarms.

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