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FIRST ALERT

First Alert SMI100-AC, 9120B Replacement Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack

  • Based on 16,488 reviews
Condition: New
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Availability: In Stock.
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Arrives Saturday, Nov 1
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Size: 1-Pack


Style: Precision Detection


Pattern Name: SMI100-AC


Features

  • First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
  • Through early warning interconnect, when one alarm sounds, all compatible alarms will sound
  • Battery backup provides continuous protection during power outages
  • Alarm indicator visually identifies the unit that initiated the alarm
  • Quick Connect Plug included allows for easy installation with no need to rewire

Description

The First Alert SMI100-AC Hardwire Interconnect Smoke Alarm with Battery Backup meets new industry standards utilizing First Alert's Precision Detection advance sensing technology. This hardwire smoke alarm is easy to install and replace existing alarms with no need to rewire. Plus interconnect compatible alarms to create a whole home alarm system to help provide an early warning.

Brand: FIRST ALERT


Style: Precision Detection


Power Source: Battery Powered


Color: White


Product Dimensions: 5.6"D x 5.6"W x 1"H


Item Weight: 9.6 ounces


Alarm: Smoke Alarm


Sensor Type: Ionization


Number of Items: 1


Manufacturer: Resideo


Item Weight: 9.6 ounces


Item Dimensions D x W x H: 5.6"D x 5.6"W x 1"H


Sensor Type: Ionization


Alarm: Smoke Alarm


Power Source: Battery Powered


Color: White


Style Name: Precision Detection


UPC: 029054022462


Manufacturer: Resideo


Brand Name: FIRST ALERT


Model Number: SMI100-AC


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 1

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews

    • Easy installation
Size: 3-Pack Style: Precision Detection Pattern Name: SMI100-AC
Retrofit was easy and works great
Reviewed in the United States on September 30, 2024 by Bellyboy
    • Great Value!
Size: 3-Pack Style: Standard Detection Pattern Name: 1039750
Great Value, Easy to set-up. Enjoying the Free Prime Video even though I have cable.
Reviewed in the United States on September 23, 2024 by DanniB
    • It's a smoke detector
Size: 6-Pack Style: Standard Detection Pattern Name: 9120B6CP
Review Image by P. C. Fla P. C. Fla
Bought the six pack to replace some 20+ old wired units in my house, these were a great replacement. Installation was very easy (if you're comfortable working on a ladder and with electricity). They look nice, much better than the 'yellowed' units removed, and as they are interconnected all alarm when one alarms. Only drawback is the "beam" of green light emitted, shooting across the darkened room, and flashing red led every minute (normal operation). Sofar, no issues with them, took about 10 min per unit to replace. ... show more
Reviewed in the United States on September 8, 2024 by P. C. Fla P. C. Fla
    • Safety 1st
Size: 6-Pack Style: Standard Detection Pattern Name: 9120B6CP
Great product. Easy replacement. Good quality. Easy to replace battery.
Reviewed in the United States on September 4, 2024 by Gary
    • Almost perfect drop-in replacement.
Size: 3-Pack Style: Standard Detection Pattern Name: 1039750
Replaced the three alarms in my house with these, came with everything needed to install them in the place of the old ones. I only dropped a start because for some reason one of the batteries went dead super early, but other than that they are perfectly functional.
Reviewed in the United States on June 3, 2024 by Vince
    • Quick upgrade
Size: 6-Pack Style: Standard Detection Pattern Name: 9120B6CP
Bought these to change out the complete old set from 1999. These plugged right into the old wire adapters for quick install. I was able to complete the task in about 15 min. Recommend
Reviewed in the United States on September 26, 2024 by Amazon Customer
    • Perfect fit.
Size: 6-Pack Style: Standard Detection Pattern Name: 9120B6CP
Comes with everything. Great price. Fast delivery. Quality product.
Reviewed in the United States on August 25, 2024 by Amazon Customer
    • Great product.
Size: 6-Pack Style: Standard Detection Pattern Name: 9120B6CP
Needed to replace all of the smoke detectors in my house because they were all 20 years old and starting to fail. These were super easy to swap them out with and work great!
Reviewed in the United States on October 8, 2024 by John S.

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