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🔥 Stay safe, stay savvy — smoke detection that works as hard as you do.
The First Alert SMI100 Battery Smoke Alarm features advanced Precision Detection technology to minimize nuisance alarms while providing early fire warnings. Its battery-powered design with front-access compartment ensures easy installation and maintenance. Equipped with an end-of-life alert and a test/silence button, it’s a top-rated, reliable choice for modern home safety.











| ASIN | B0CJLN45JZ |
| Alarm | Smoke |
| Best Sellers Rank | #42 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 4.6 out of 5 stars (5,233) |
| Item Dimensions D x W x H | 5.6"D x 5.6"W x 1.9"H |
| Item Type Name | Smoke Alarm |
| Item Weight | 9.6 ounces |
| Manufacturer | Resideo |
| Mfr Part Number | SMI100 |
| Model Number | SMI100 |
| Number of Items | 2 |
| Power Source | Battery Powered |
| Product Style | Precision Detection |
| Sensor Type | Ionization |
| UPC | 029054022400 |
| Unit Count | 2 Count |
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