First Alert/BRK 9120B / SC-9120B Hardwired vs First Alert SMCO210 / SMCO210V Combo
Side-by-side specs from each maker.
Only the differences are shown.
| First Alert 9120B | First Alert SMCO210 / SMCO210V Combo | |
|---|---|---|
| Type | Smoke or CO alarm | Smoke or CO alarm |
| Alarm | smoke | combo |
| Sensor | ionization | Photoelectric (smoke) and electrochemica |
| Power | Hardwired 120-volt with 9V battery backup | 10-year battery (lithium metal, not replaceable) |
| Interconnect | wired | Not listed |
| Standards (maker) | Not listed | Conforms to UL 217 10th Edition Standard; Conforms to STD UL2034 |
First Alert/BRK 9120B / SC-9120B Hardwired
An older hardwired ionization smoke alarm with 9V battery backup.
- Interconnects with up to 12 other First Alert or BRK hardwired smoke detectors and 6 other compatible devices
- 9V battery included
- Ionization sensing only
First Alert SMCO210 / SMCO210V Combo
A battery-powered smoke and carbon monoxide combo alarm with a sealed 10-year lithium battery.
- Sealed 10-year battery, no battery swaps
- UL 217 10th edition and UL 2034
- Slim profile