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First Alert

First Alert Smoke Alarm, 10-Year Sealed Battery Detector with Test & Silence Button, SMI110, 1-Pack

Based on 7,732 reviews
Condition: New
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$24.59
Holiday Deal · 18% off was $29.99

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Nov 14
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At a glance

Condition
New
Style
Precision Detection
Pattern
SMI110
Dimensions
5.6"D x 5.6"W x 2"H
Weight
10.2 oz
Color
White
Power Source
Battery Powered

Features 4

  • 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.
  • 10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
  • End-of-life warning lets you know when its time to replace the alarm
  • Test/silence button for efficient testing to ensure alarm is working properly

Description

The First Alert SMI110 10-Year Sealed Battery Smoke Alarm provides reliable protection and meets new industry standards. First Alert's Precision Detection advanced sensing technology helps reduce cooking nuisance alarms and provide an early warning. The 10-year sealed battery makes installation of the alarm easy and no battery replacements are needed for the life of the alarm.

Specs 21

Brand First Alert
Style Precision Detection
Power Source Battery Powered
Color White
Product Dimensions 5.6"D x 5.6"W x 2"H
Alarm Smoke
Operating Humidity 10-95% RH
Sensor Type Ionization

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 14

This item is non-returnable:

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

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
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  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Installed fine, seem to work, and flashing lite isn't a disturbance
Style: Precision Detection Pattern Name: SMI110
They installed without an issue. Tested fine once installed. They do have a flashing light that goes off every minute to let you know they're working, and I was concerned about them being in the bedrooms. But the light is subtle enough that you really don't see it and it isn't disturbing. Without the house catching on fire, don't for sure if they'll work. Assuming they will. ... show more
Reviewed in the United States on June 12, 2025 by Shelley P
No need to worry about batteries
Style: Precision Detection Pattern Name: SMI110
I used to use the hard-wired detectors so that I don't need to change the battery frequently. This detector comes with a built in 10 year battery, so I no longer need to hard wire my detectors. I can just install it forget it. Plus it's very easy to install.
Reviewed in the United States on May 16, 2025 by Amazon Customer
Not sure how its working
Style: Standard Detection Pattern Name: 0827B
Very neat nice noise it makes. Sometimes it misses the stove smoke (like ten fifteen times) but like once or twice it went off while i was doing not much anything
Reviewed in the United States on May 16, 2025 by Diana Chen
Read the instructions carefully.
Style: Precision Detection Pattern Name: SMI110
I bought two of these smoke detectors. I removed them from the boxes and removed the yellow tags as directed, but neither of the detectors worked when I tried to test them. I went through the Amazon process of complaining only to be told to contact the manufacturer via a telephone number provided. I talked to the manufacturer's representative and explained what I did. He told me that the detector had to placed into its ceiling attachment bracket before trying to test it. I did this and both detectors worked as required. I am quite satisfied with the detectors but the instructions could have been a little clearer. ... show more
Reviewed in the United States on April 10, 2025 by Anthony V. Leone
Good value for replacement smoke alarm.
Style: Precision Detection Pattern Name: SMI110
Easy to install. Good price. Arrived as per stated. I had to fiddle a bit with getting the mounting screws in place - for all of two minutes. Biggest problem with this purchase? Delivery driver did not shut gate behind themselves on the way out.
Reviewed in the United States on May 4, 2025 by bob zielazinski
Great wonderful. and life saving
Style: Precision Detection Pattern Name: SMI110
Super impressed with the quality and performance. Easy to use, works perfectly, and arrived fast. Great value for the price—would definitely buy again!
Reviewed in the United States on May 8, 2025 by Yellow Stone
False Advertising
Style: Standard Detection Pattern Name: 0827B
I bought eight of these in May of 2023 because description says 10 year battery life. They've all failed after only two years. I do not see a way to contact First Alert for product replacement support. Would not buy again.
Reviewed in the United States on June 14, 2025 by andrew thiessen
As described
Style: Precision Detection Pattern Name: SMI110
As described
Reviewed in the United States on May 21, 2025 by Clinton
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