






🔥 Stay safe, stay savvy — smoke detection that works as hard as you do!
The First Alert SMI100 is a battery-powered smoke alarm featuring advanced Precision Detection technology to minimize false alarms and provide early fire warnings. Designed for easy installation and maintenance, it includes a front-access battery compartment, test/silence button, and end-of-life alerts, ensuring reliable protection and peace of mind in any home.







| Brand | First Alert |
| Style | Precision Detection |
| Power Source | Battery Powered |
| Color | White |
| Product Dimensions | 5.4"D x 5.4"W x 1.9"H |
| Item Weight | 0.7 Pounds |
| Alarm | Smoke Alarm |
| Operating Humidity | 10-95% RH |
| Sensor Type | Ionization |
| Number of Items | 1 |
| Manufacturer | Resideo |
| UPC | 029054022387 |
| Item Weight | 11.2 ounces |
| Item model number | SMI100 |
| Size | 1-Pack |
| Pattern | SMI100 |
| Item Package Quantity | 1 |
| Included Components | 9V Alkaline Battery |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
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