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First Alert 9120B / SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack
✅ In stock
F
Grade
Analysis Confidence
88%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 23, 2026 8:28 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price is slightly above the going rate for this product — worth watching for a drop.
- 📉It has been quite a while since a more competitive price was available, lending today's offer solid comparative value.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
1.26/20
Deal Strength
1.5/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Certified Wholesale Supply
🚚 Shipping
Free Shipping
Product Details
✓Keep your family safe with this 3 pack of hardwired smoke alarms; the battery backup means constant monitoring, even if there's a power failure
✓Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm
✓To ensure complete protection make sure to place one on each level of your home and in each bedroom
✓Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected
✓Simple to use, with a single test/silence button, and side load battery compartment; Tamper resistant locking brackets and universal mounting brackets make installation easy
✓Rigorously tested to meet UL standards
✓Faster turnarounds on job sites with the easy to install, most trusted alarms in home safety
✓First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
⚙️ Specifications
Brand
First Alert
Style
Standard Detection
Power Source
Battery Powered,Hardwired
Color
White
Product Dimensions
1.9"D x 5.6"W x 5.6"H
Item Weight
9.6 ounces
Sensor Type
Ionization
Global Trade Identification Number
00029054018489
Number of Items
3
Manufacturer
First Alert
UPC
029054018489
