First Alert SMI105-AC smoke alarm front view with interconnect indicator for early warning

First Alert

First Alert SMI105-AC Interconnected Smoke Alarm – 6-Pack with 10-Year Battery Backup

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

$203.14

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Why customers choose TaskHolt Tools

Experience reliable, interconnected safety with the First Alert SMI105-AC Interconnect Hardwire Smoke Alarm. This 6-pack is designed to meet current industry standards and provides continuous protection, even when the power grid fluctuates.

Precision Detection technology helps distinguish true emergencies from typical cooking or appliance activity, reducing nuisance alarms while keeping you informed. The interconnect feature lets one alert trigger a whole-home warning, so everyone nearby can respond quickly.

Key benefits

  • 10-Year battery backup ensures ongoing protection during power outages.
  • When one alarm sounds, all compatible alarms in the network will sound to create a broader alert.
  • Visual indicator on each unit shows which detector initiated the alert for quick identification.
  • End-of-Life warning lets you know when to replace the alarm.

Practical uses

  • Multi-story homes and open-floor plans benefit from the interconnected system that spreads warnings across living areas.
  • Kitchens or high-activity zones can still protect families without excessive nuisance alarms, thanks to refined sensing.
  • During outages, the 10-year backup keeps a reliable audible signal for family safety.

Designed for compatibility with standard hardwire networks, the First Alert SMI105-AC is a practical addition to a modern home safety setup. End users should follow installation guides and local electrical codes when wiring multiple detectors.

FAQ

Q: How does the interconnect feature work?

A: When one alarm sounds, all compatible alarms in the network will sound to provide broad warning across the home.

Q: How long does the 10-year battery backup last?

A: The SMI105-AC includes a 10-year battery backup for protection during power outages.

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