First Alert CO605 Plug-in Carbon Monoxide Alarm vs First Alert SMCO210 / SMCO210V Combo
Side-by-side specs from each maker.
Only the differences are shown.
| First Alert CO605 Plug-in Carbon Monoxide Alarm | First Alert SMCO210 / SMCO210V Combo | |
|---|---|---|
| Type | Smoke or CO alarm | Smoke or CO alarm |
| Alarm | CO | combo |
| Sensor | electrochemical | Photoelectric (smoke) and electrochemica |
| Power | Plug-in with battery backup | 10-year battery (lithium metal, not replaceable) |
| Standards (maker) | Not listed | Conforms to UL 217 10th Edition Standard; Conforms to STD UL2034 |
First Alert CO605 Plug-in Carbon Monoxide Alarm
A plug-in carbon monoxide alarm with an electrochemical sensor, battery backup for power outages and a single test and silence button.
- Battery backup
- Plugs into a standard outlet
- 85 decibel alarm
- Needs an outlet
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