First Alert SMI105-AC White Hardwire Smoke Alarm with 10-Year Battery Backup for Home Safety
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup
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First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup

|35 ratings

Key item features

  • Advanced Sensing: Features First Alert's BRK Precision Detection technology, complying with new industry standards to reduce nuisance alarms from cooking and provide early fire warnings.
  • Continuous Power: Includes a 10-year battery backup, ensuring uninterrupted protection during electrical outages.
  • Interconnected Alarms: Allows for interconnectivity, so when one alarm activates, all compatible alarms throughout the home will sound.
  • Alarm Identification: Equipped with an alarm indicator that visually pinpoints the specific unit that initiated the alert.
  • Replacement Notification: Provides an end-of-life warning, signaling when the device needs to be replaced.
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4.3 out of 5 stars
stars
35 ratings19 reviews
How item rating is calculated
  1. 5 stars71% (25)
  2. 4 stars11% (4)
  3. 3 stars3% (1)
  4. 2 stars3% (1)
  5. 1 star11% (4)
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Showing 1-3 of 19 reviews

Aug 30, 2025
Reviewer name: Jean
Top Reviewer
Sold and shipped byTop Rated Seller.
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

great value

The firemen at my house said First Alert were the best he has them in his house as I have so many the price is right

Helpful?1DLTCH1FXKAD11613168758
Dec 21, 2025
Reviewer name: Dan
Sold and shipped byTop Rated Seller.
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

10 year model

Well worth buying the model with a ten year battery. Beats waking up a 2AM with a one year low battery model chirping

Helpful?1DLTCH1FXKAD11613168758
Jul 3, 2025
Reviewer name: deb
Sold byTop Rated Seller.Delivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great buy!

Very good product for the money - 10 yr battery life, installs easily and quickly!

Helpful?1DLTCH1FXKAD11613168758
Current price is $36.95
Price when purchased online
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  • Free 30-day returns
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Sold and shipped by Top Rated Seller.
4.389360061680802 out of 5 stars
4.389360061680802 stars out of 5, based on 3891 seller reviews(4.4)
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