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First Alert Smoke Alarm, Interconnect Hardwire Detector with 10-Year Battery Backup, SMI105-AC, 3-Pack
AMAZON.COM
Price
$ 79.09
Last price was updated on: 12th Dec 2025, 01:39 PM
Pricing Analytics & Buying Assistance
Price Score:
Good
Poor
Average
Good
Excellent
Current Price
$79.09
$64.94
Lowest
$104.94
Highest
Buying Advice:
Good – Worth buying. 82% chance price goes up. Buy soon.
Good – Worth buying. 82% chance price goes up. Buy soon.
Price History Benchmarks
Lowest Ever
$64.94
7th Jul 2025
Highest Ever
$104.94
19th Jul 2024
Average Price
$84.09
282 data points
Last 3M Low
$77.60
28th Oct 2025
Last 6M Low
$64.94
7th Jul 2025
Last 12M Low
$64.94
7th Jul 2025
Price History Chart
Product Technical Information
| Product Code | B0CJLCXYY6 |
|---|---|
| Market Place | amazon.com |
| Market Place Name | Amazon.com |
| Brand Name | First Alert |
| Rating | 4.6 ( 1937 ratings ) |
| Category | Smoke Detectors & Fire Alarms |
| Manufacturer | Resideo |
| Model Number | SMI105-AC |
| Item Color | White |
| Item Size | 3-Pack |
| Item Dimensions | 5.5"D x 2"W x 5.5"H |
Frequently Asked Questions
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What is the lowest price ever for this product?The lowest price for First Alert Smoke Alarm Interconnect Hardwire Detector with 10-Year Battery Backup SMI105-AC 3-Pack was $64.94 on 7th Jul 2025. This is the best recorded deal so far.
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What is the highest price ever for this product?The highest price for First Alert Smoke Alarm Interconnect Hardwire Detector with 10-Year Battery Backup SMI105-AC 3-Pack was $104.94 on 19th Jul 2024. Prices have dropped since then.
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What is the average price of this product?The average price for First Alert Smoke Alarm Interconnect Hardwire Detector with 10-Year Battery Backup SMI105-AC 3-Pack is $84.09 (282 data points). This helps you compare current deals.
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What is the lowest price in the last 3 months?In the last 3 months, First Alert Smoke Alarm Interconnect Hardwire Detector with 10-Year Battery Backup SMI105-AC 3-Pack reached a low of $77.60 on 28th Oct 2025. Recent price trends may help you decide when to buy.
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Should I buy this product now?Worth buying. The price is good, but you may wait for a better deal. 82% chance price goes up. Price may increase soon.