Price Drop
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | SMI105-AC
-17%
$32.99
$39.99
Current Price
$32.99
List Price
$39.99
30-Day Avg
$39.99
Lowest Ever
$21.99
- ASIN
- B0CJMPZ65Q
- Model
- SMI105-AC
- Color
- White
- Size
- 1-Pack
1000+ bought in past month
Best for
- Under $50
- 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 with 10-Year Battery Backup | SMI105-AC | $32.99 | $39.99 | -17% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $27.00 | $39.99 | -32% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $32.30 | $39.99 | -19% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $34.95 | $39.99 | -12% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $33.80 | $39.99 | -15% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $30.75 | $39.99 | -23% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $30.15 | $39.99 | -24% | Price Drop |
First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | $29.95 | $39.99 | -25% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.15 | $39.99 | -24% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.77 | $39.99 | -23% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $26.12 | $39.99 | -34% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.99 | $39.99 | -22% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.99 | $39.99 | -22% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.07 | $39.99 | -24% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.99 | $39.99 | -22% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $29.78 | $39.99 | -25% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $29.96 | $39.99 | -25% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.03 | $39.99 | -24% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $29.78 | $39.99 | -25% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.82 | $39.99 | -22% | Price Drop |
First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack | $30.99 | $39.99 | -22% | Price Drop |
Details
First Alerts 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 battery backup provides continuous protection during power outages
Through early warning interconnect, when one alarm sounds, all compatible
Alarm indicator visually identifies the unit that initiated the alarm
End-of-life warning lets you know when it’s time to replace the alarm
10-Year battery backup provides continuous protection during power outages
Through early warning interconnect, when one alarm sounds, all compatible
Alarm indicator visually identifies the unit that initiated the alarm
End-of-life warning lets you know when it’s time to replace the alarm
Deal Summary
This First Alert deal offers the First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | SMI105-AC for $32.99 USD, down from $39.99 USD, representing a 18% discount. Last verified on .
- Current Price
- $32.99 USD as of
- Original Price
$39.99 USD- Discount
- 18% off
- Brand
- First Alert
- Category
- Today's new
- ASIN
B0CJMPZ65Q- Last Verified
Why this deal is notable
The current 18% discount is below the Amazon list price for the First Alert Hardwire Smoke Alarm with 10-Year Battery Backup | SMI105-AC. Over 1000 buyers purchased this this brand item in the past month. Stock is currently available on Amazon as of November 3, 2026.
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