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First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 12-Pack
✅ In stock
C
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 13, 2026 10:49 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
🙂 Fair Price- 🙂Verdict: Fair Price. Small discount vs history. Consider waiting for a better drop.
- 💰At 9% off its standard going rate, this offer delivers clear value for the money.
- 🏷️The listed retail price is trimmed by 4% at checkout.
- 📉Going back roughly eight months, a more competitive price has not appeared — this stands out as a strong value by recent standards.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
10.34/28
Recent Value
3.45/22
Market Standing
14.7/20
Deal Strength
13/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
RES, LLC
🚚 Shipping
Free Shipping
Product 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 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
⚙️ Specifications
Brand
First Alert
Style
Precision Detection
Power Source
Battery Powered
Color
White
Product Dimensions
5.5"D x 2"W x 5.5"H
Item Weight
8.8 ounces
Alarm
85 dB
Operating Humidity
10-95% RH
Sensor Type
Ionization
Number of Items
12
Manufacturer
Resideo
