First Alert Battery Smoke Alarm | SMI100

$16.99

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Size: 1-Pack

Price checked Oct 19, 2026, 9:34 AM PDT

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Product details

ASIN: B0CJMP7WHH
GTIN / UPC: 029054022387
Brand: First Alert
Category: Tools & home improvement
Availability: In stock at last check
Last checked: today

Specifications

Size: 1-Pack
Color: White
Model: SMI100
Part number: SMI100
Manufacturer: Resideo
Dimensions: 5.4 × 5.4 × 1.9 in
Weight: 11.2 oz

About this item

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.
Battery-operated alarm allows for easy installation and maintenance
Front access battery compartment makes for easy battery replacements
End-of-life warning lets you know when it’s time to replace the alarm
Test/silence button for efficient testing to ensure alarm is working properly

Compare before you buy

See how this exact product compares with other models and bundles.

Which smoke alarm fits your sensor and battery plan?
Choose by the sensing type your home plan calls for and how you want to handle battery changes. SMI100 is ionization with one replaceable 9V alkaline battery; SD2J0AX is photoelectric with a sealed lithium battery rated by its manufacturer for 10 years.

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