








🏠 Stay ahead of danger with smart, seamless safety that lasts a decade!
The FIRST ALERT SC9120B is a hardwired combination smoke and carbon monoxide alarm featuring adapter plugs for easy replacement without rewiring. It includes a 10-year lithium battery backup for uninterrupted monitoring, electrochemical CO sensing, and intelligent smoke detection technology to minimize false alarms. With an 85dB siren, clear indicator lights, a single test/silence button, and an end-of-life signal, it offers reliable, long-term home safety backed by UL standards and a 10-year limited warranty.







| Brand | First Alert |
| Power Source | Corded Electric |
| Color | white |
| Product Dimensions | 0.07"D x 0.22"W x 0.22"H |
| Item Weight | 0.63 Pounds |
| Alarm | Audible |
| Sensor Type | Electrochemical |
| Global Trade Identification Number | 00029054018786 |
| Material | Plastic |
| Number of Items | 1 |
| Manufacturer | First Alert |
| Style | Hardwired |
| UPC | 029054018786 |
| Part Number | 1039807 |
| Item Weight | 10.1 ounces |
| Item model number | SC9120B |
| Batteries | 1 Lithium Metal batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Size | No Size |
| Pattern | Alarm |
| Shape | Triangle |
| Item Package Quantity | 1 |
| Included Components | Alarm, Battery |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Metal |
| Warranty Description | Warranty |
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