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The First Alert SMI100 is a battery-operated smoke alarm featuring advanced Precision Detection technology that minimizes false alarms while providing early fire warnings. Its user-friendly design includes a front-access battery compartment, a test/silence button for easy maintenance, and an end-of-life alert to ensure continuous home safety. Ideal for quick installation and reliable protection, itโs a top-rated choice for modern households.











| ASIN | B0CJMP7WHH |
| Alarm | Smoke Alarm |
| Best Sellers Rank | #40 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Smoke Detectors & Fire Alarms |
| Brand | First Alert |
| Built-In Media | 9V Alkaline Battery |
| Color | White |
| Customer Reviews | 4.6 out of 5 stars 4,086 Reviews |
| Item Dimensions D x W x H | 5.4"D x 5.4"W x 1.9"H |
| Item Type Name | Smoke Alarm |
| Item Weight | 0.7 Pounds |
| Manufacturer | Resideo |
| Model Number | SMI100 |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered |
| Product Dimensions | 5.4"D x 5.4"W x 1.9"H |
| Product Style | Precision Detection |
| Sensor Type | Ionization |
| Style | Precision Detection |
| UPC | 029054022387 |
| Unit Count | 1.0 Count |
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