Price Drop
First Alert Hardwire Smoke Alarm | SMI100-AC, 9V Battery Backup, 1-Pack
-26%
$22.19
$29.99
Current Price
$19.49
List Price
$29.99
30-Day Avg
$29.99
Lowest Ever
$16.00
- ASIN
- B0CJMN3443
- Model
- SMI100-AC
- Color
- White
- Size
- 1-Pack
7000+ bought in past month
Best for
- Budget Picks
- Families
- Apartment Dwellers
- New Homeowners
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Price History
Price history chart is not available
In-Site Price History
| Product | Current Price | Original Price | Discount | Status |
|---|---|---|---|---|
First Alert Hardwire Smoke Alarm | $19.46 | $29.99 | -35% | Price Drop |
First Alert Hardwire Smoke Alarm | $19.49 | $29.99 | -35% | Price Drop |
First Alert Hardwire Smoke Alarm | $19.46 | $29.99 | -35% | Price Drop |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.49 | $29.99 | -35% | Price Drop |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.67 | $29.99 | -34% | Price Drop ✓ Verified Low Price |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.59 | $29.99 | -34% | Price Drop ✓ Verified Low Price |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.63 | $29.99 | -34% | Price Drop ✓ Verified Low Price |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.67 | $29.99 | -34% | Price Drop ✓ Verified Low Price |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.88 | $29.99 | -33% | Price Drop ✓ Verified Low Price |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $20.09 | $29.99 | -33% | Price Drop ✓ Verified Low Price |
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | $19.67 | $29.99 | -34% | Price Drop ✓ Verified Low Price |
Details
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 sound
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
Through early warning interconnect, when one alarm sounds, all compatible alarms will sound
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
Deal Summary
This First Alert deal offers the First Alert Hardwire Smoke Alarm | SMI100-AC, 9V Battery Backup, 1-Pack for $22.19 USD, down from $29.99 USD, representing a 26% discount. Last verified on .
- Current Price
- $22.19 USD as of
- Original Price
$29.99 USD- Discount
- 26% off
- Brand
- First Alert
- Category
- Today's new
- ASIN
B0CJMN3443- Last Verified
Why this deal is notable
The current 26% discount is below the Amazon list price for the First Alert Hardwire Smoke Alarm | SMI100-AC, 9V Battery Backup, 1-Pack. Over 7000 buyers purchased this this brand item in the past month. Stock is currently available on Amazon as of November 1, 2026.
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