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🔥 Stay safe, stay savvy — smoke detection made smart and simple!
The First Alert SMI100 is a top-rated, battery-operated smoke alarm featuring advanced Precision Detection technology to minimize false alarms. Designed for easy installation and maintenance, it includes a front-access battery compartment, a test/silence button, and an end-of-life warning to ensure your home’s safety is always up to date.











| ASIN | B0CJMP7WHH |
| Alarm | Smoke Alarm |
| Best Sellers Rank | #35 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 (4,506) |
| 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 | 11.2 ounces |
| Manufacturer | Resideo |
| Mfr Part Number | SMI100 |
| Model Number | SMI100 |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered |
| Product Style | Precision Detection |
| Sensor Type | Ionization |
| UPC | 029054022387 |
| Unit Count | 1.0 Count |
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