First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
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First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

|95 ratings
First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-PackFirst Alert Combination Smoke Carbon Monoxide Alarm Interconnect Hardwire Detector with Battery Backup SMICO100 AC 1 PackFirst Alert SMICO100 AC Interconnect Hardwire Combination Smoke Carbon Monoxide Alarm with Battery Backup 12 PackFirst Alert SMICO100 AC Interconnect Hardwire Combination Smoke Carbon Monoxide Alarm with Battery Backup 3 PackFirst Alert SMICO100 AC Interconnect Hardwire Combination Smoke Carbon Monoxide Alarm with Battery Backup 6 Pack
Count Per Pack1

Key item features

  • First Alerts 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 Quick Connect Plug allows for easy installation with no need to rewire
  • Battery backup provides continuous protection during power outages
  • Test/silence button for efficient testing to ensure alarm is working properly

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Customer ratings & reviews

4.2 out of 5 stars
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95 ratings21 reviews
How item rating is calculated
  1. 5 stars66% (63)
  2. 4 stars12% (11)
  3. 3 stars8% (8)
  4. 2 stars3% (3)
  5. 1 star11% (10)
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Showing 1-3 of 21 reviews

Aug 25, 2026
Reviewer name: Melissa
Top Reviewer
Item details
Count per pack: 1
Sold byTop Rated Seller.Delivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great Detector

Easy to install and gives peace of mind.

Helpful?4CLRHEVAVYF419258058570
Jun 4, 2026
Reviewer name: Steven
Item details
Count per pack: 3
Sold byTop Rated Seller.Delivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Easy replacement for older model

Great product Had to replace four wired detectors that reached their ten year expiration Only needed to switch out the mounting plate which was very easy The wiring connector fit perfectly

Helpful?4CLRHEVAVYF419258058570
Jul 2, 2026
Reviewer name: anonymous
Item details
Count per pack: 6
Sold byTop Rated Seller.Delivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

We had to replace our 6 existing fire alarms as they were 8 years old and going wonky. The replacement fire alarms were larger than our prior alarms, but they fit perfectly! They have only been up a month. So far so good.

Helpful?4CLRHEVAVYF419258058570
Current price is $53.99
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4.389360061680802 stars out of 5, based on 3891 seller reviews(4.4)
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