First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
Thumbnail 1Thumbnail 2Thumbnail 3Thumbnail 4Thumbnail 5Thumbnail 6

First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack

4.5/5
Product ID: 604424417
Secure Transaction
12 interest-free installments with tabby

Details

  • Brand
    FIRST ALERT
  • Style
    Precision
  • Power Source
    Battery
  • Color
    White
  • Product Dimensions
    5.4"D x 5.4"W
  • Item Weight
    11.2 ounces
⏳End-of-life warning for timely replacement
⚡Battery-powered for hassle-free setup
đź””Test & silence button for instant control

Description

🔥 Stay safe, stay savvy — smoke detection that works as hard as you do! 🔥

  • INSTANT CONTROL - Test and silence button lets you verify functionality or mute nuisance alarms on demand.
  • SMART SAFETY ALERTS - End-of-life warning ensures you never miss when it’s time to upgrade.
  • EFFORTLESS INSTALLATION - Battery-operated design means no wiring—install anywhere in minutes.
  • PRECISION DETECTION TECH - Advanced sensing reduces false alarms from cooking, so you stay worry-free.
  • USER FRIENDLY MAINTENANCE - Front-access battery compartment makes replacements quick and clean.

The First Alert SMI100 is a battery-operated smoke alarm featuring advanced Precision Detection technology to minimize false alarms, a convenient front-access battery compartment, a test/silence button for easy operation, and an end-of-life warning to ensure continuous home safety.

Large manufacture image 1Large manufacture image 2Large manufacture image 3
Small manufacture image 1Small manufacture image 2Small manufacture image 3Small manufacture image 4

Specifications

BrandFIRST ALERT
StylePrecision Detection
Power SourceBattery Powered
ColorWhite
Product Dimensions5.4"D x 5.4"W x 1.9"H
Item Weight11.2 ounces
AlarmSmoke Alarm
Sensor TypeIonization
Number of Items1
ManufacturerResideo
UPC029054022387
Country of OriginMexico
Item model numberSMI100
Size1-Pack
PatternSMI100
Item Package Quantity1
Included Components9V Alkaline Battery
Batteries Included?Yes
Batteries Required?Yes
Battery Cell TypeAlkaline

Reviews

4.5

All from verified purchases

M**E

Basic smoke detector battery operated

Basic smoke detector - Battery operated. The back shares plate with plug in kind but it not functional. Just less parts to manufacture.Waiting for the new wireless unit that replaced the nest protect so this was just to get by tell then. Hard to beat price

C**N

House is safer with these detectors.

Saw a video on news of recent fire. Captured on Ring camera across the street. House burned within minutes! Bystanders ran in to save family. Fire trucks arrived in fifteen minutes, but damage was extensive. That was enough to convince us to put a detector in every single room. Worth every penny.

I**R

The BEST Smoke Alarm I’ve Had

I just replaced my Kidde wired smoke detectors with these battery operated ones. Bought 2 to begin with, and just ordered 4 more for the rest of the house. Perfect fit! So easy to install. I just had to take off the old mount, install the new mounts, pull the battery tag, test and they are up and going. I have always went with Kidde, but have noticed over the years that some of their products aren’t as good as they used to be. The last batch of Kidde smoke alarms I bought on Amazon had a 2014 date, but I bought them in 2018. My now ex put them up. Not sure why he didn’t check the date. So I only got 7 years out of them. The First Alert smoke alarms are so easy to test. Just overall a good product.

A**R

Smaller than the original First Alert alarm.

Wish it would have fit the existing First Alert alarm, which was supposed to last 10 years but only lasted four. But it was no big deal to change the mount - it used the same screw holes.

E**D

Uses 9 volt (included ) and has easy access battery door.

This detector uses a 9 volt battery (included) and has an easy access door. You can change the battery with removing the detector. These were fresh manufacture date was 14 Feb 25. Excellent price when you order the 2 pack. It is recommended that you replace a smoke detector 10 years from the date of manufacture. I was a retired insurance agent so I would have access to loss data that the insurance industry keeps track of. 20 percent of all persons killed in a house fire did not have a working smoke detector in the home at the time of the fire. So be safe replace after 10 years and test your detectors monthly.

L**A

Definitely recommend

We got a new furnace recently. The gas kicked on and burned some of the residue off the furnace from when they installed it. It tripped this smoke detector even though there wasn't even any visible smoke. I thought the room would have to be filled with smoke for this to work but no. I definitely recommend this to anyone looking to buy a smoke detector. It is very sensitive! It will save your life!

C**S

Happy Customer

Does what it says. Easy to put in.

D**R

Unit died after 6 years, but great customer service/warranty, getting replaced

5 stars for customer service. Bought 4 of these a little over 6 years ago, one started giving the end-of-life alert. Called to see if the 10-year warranty covered it, it does, they're sending a new one, no hassle.As far as the unit itself - I haven't had a fire, so that's good. A few false alarms, but only when I'm generating smoke cooking, so understandable.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Shop Global, Save with Desertcart
Value for Money
Competitive prices on a vast range of products
Shop Globally
Serving over 300 million shoppers across more than 200 countries
Enhanced Protection
Trusted payment options loved by worldwide shoppers
Customer Assurance
Trusted payment options loved by worldwide shoppers.
Desertcart App
Shop on the go, anytime, anywhere.
AED 97

Duties & taxes incl.

UAEstore
1
Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction
12 interest-free installments with tabby

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

First Alert Smoke Alarm Battery Operated Detector With Test Silence | Desertcart UAE