Features photoelectric and ionization sensors for increased detection The photoelectric sensor detects smoldering fires from objects like cigarettes burning on furniture or in trash cans The ionization sensor detects fast-flaming fires like erupting kitchen grease fires or combustibles Hardwired alarm includes battery backup for power outages A single button makes alarm easy to test monthly, or silence during a false alarm Two latching features help indicate a low battery or the originating alarm in a system Optipath 360 patented technology provides 360 degrees of access to the smoke alarm
| Make | First Alert |
|---|---|
| Manufacturer | First Alert / BRK Brands Inc. |
| Model code | 3120B |
| Style | Photoelectric |
| Type | Smoke |
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