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First Alert SMI100-AC Hardwire Interconnect Smoke Alarm
29th Apr 2026, 10:33 PM

First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack

Price may vary by location, shipping cost, and availability.
$177.26

Buy @ amazon.com
Highest: $349.99
Average: $190.82
Lowest: $129.99

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Based our analysis and observation, there is 59.06% chance that the price of First Alert SMI100-AC Hardwire Interconnect Smoke Alarm... will increase. Price of product might fluctuate between 2% and 6% of current price.*

Price History Graph

Offer Price Prices
Lowest: -
Average: -
Highest: -

Price History Information

You can check the price history of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack here. This product's current Price in USA is $177.26. The average and highest prices are $190.82 and $349.99 respectively.

Lowest Ever Price $129.99
26th May 2025
Average Price $190.82
Based on 841 days price tracking
Highest Price $349.99
17th Jun 2024

Current Price in USA

Price $177.26

Recent Price Drops on First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack

Price Drop 29th Jan 2026
$183.90 → $172.26
6.33% drop
Price Drop 11th Dec 2025
$186.55 → $172.26
7.66% drop
Price Drop 1st Dec 2025
$184.98 → $172.26
6.88% drop
Price Drop 17th Jun 2025
$173.98 → $155.00
10.91% drop
Price Drop 25th May 2025
$177.99 → $129.99
26.97% drop
Price Drop 25th Apr 2025
$183.28 → $170.26
7.1% drop
Price Drop 25th Nov 2024
$194.26 → $179.00
7.86% drop
Price Drop 30th Oct 2024
$198.75 → $175.00
11.95% drop
Price Drop 12th Sep 2024
$239.00 → $206.26
13.7% drop
Price Drop 27th Aug 2024
$226.26 → $208.26
7.96% drop
Price Drop 22nd Aug 2024
$239.00 → $226.26
5.33% drop
Price Drop 7th Aug 2024
$239.00 → $226.26
5.33% drop
Price Drop 31st Jul 2024
$299.90 → $249.90
16.67% drop
Price Drop 23rd Jun 2024
$349.99 → $195.26
44.21% drop
Price Drop 26th Mar 2024
$244.80 → $229.48
6.26% drop

Product Information

Details

Product Name First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
Store Product Code B0CJLG19H6
Store Name amazon.com
Brand First Alert
Rating 9.2 / 10
Category Smoke Detectors & Fire Alarms
Product Manufacturer Resideo
Model Number SMI100-AC
Color White
Size 12-Pack
Dimensions 5.5"D x 2"W x 5.5"H

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 soun
  • 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

Images

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Image of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
Image of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
Image of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
Image of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
Image of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
Image of First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack

Rating and Reviews

9.2 Based on 1969 reviews

First Alert SMI100-AC Hardwire Interconnect Smoke Alarm has 9.2 rating out of 10. This average rating is consist of 1969 individual ratings. You can rate this product at product review page.

* Predictions is created on based of past prices and trends, it does not guarantee that it will happen. These are just prediction for theoretical information only.
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