First Alert - SMI100 Battery-Operated Smoke Alarm - White
Reviews coming soon
About this product
The First Alert® SMI100 Battery-Operated Smoke Alarm is equipped with our Precision Detection™ advanced-sensing technology and meets the latest industry standards. The result is fewer cooking nuisance alarms and better smoke detection from synthetic materials which burn hotter and faster. That early detection allows you and your loved ones more time to escape safely. The battery-operated basic smoke alarm is easy to install, features a single test/silence button for simple operation, and the front access battery compartment makes for easy battery replacements.
Features
Early Warning
Provides early warning to help you and your loved ones safely escape in case of smoke detection
Advanced Sensing
Precision Detection technology reduces nuisance alarms and detects smoke from synthetic materials that burn hotter and faster
Battery Operated
Runs on a 9-volt battery with no rewiring required, ensuring operation during power outages
Easy Installation
Includes mounting bracket and screws for quick setup in multiple locations without electrical work
Convenient Controls
Features a single test/silence button for simple operation and front-access battery door for easy replacement
Specifications
- Detector TypeSmokeSensor TypeIonizationPower SourceBattery-poweredNumber of Devices Included1
Reviews
This product doesn't have any reviews yet.
Compare similar products

The First Alert® SMI100 Battery-Operated Smoke Alarm is equipped with our Precision Detection™ advanced-sensing technology and meets the latest industry standards. The result is fewer cooking nuisance alarms and better smoke detection from synthetic materials which burn hotter and faster. That early detection allows you and your loved ones more time to escape safely. The battery-operated basic smoke alarm is easy to install, features a single test/silence button for simple operation, and the front access battery compartment makes for easy battery replacements.

Hardwired photoelectric smoke alarm with Precision Detection provides early warning of home fires while helping to reduce nuisance alarms from everyday cooking. Voice and location alerts clearly announce where smoke is detected, and interconnect capability ensures all compatible alarms sound together for whole-home protection. Integrated battery backup keeps the 85 dB alarm operating during power outages, and a large test/silence button simplifies maintenance.
| Pros for First Alert - SMI100 Battery-Operated Smoke Alarm - White | |||
|---|---|---|---|
| There were no pros for this product— | Installation Ease, Connectivity, Overall Performance, Compatibility, Battery Life | There were no pros for this product— | There were no pros for this product— |
| Cons for First Alert - SMI100 Battery-Operated Smoke Alarm - White | |||
| There were no cons for this product— | Alarm Accuracy, Features, Night Light, Size | There were no cons for this product— | There were no cons for this product— |
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.











































