First Alert CO605 Plug-in Carbon Monoxide Alarm vs First Alert SMCO500V Combo
Side-by-side specs from each maker.
Only the differences are shown.
| First Alert CO605 Plug-in Carbon Monoxide Alarm | First Alert SMCO500V 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 | AA (2 alkaline, replaceable) |
| Interconnect | Not listed | wireless |
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 SMCO500V Combo
A battery-operated smoke and CO combo alarm with voice alerts that give the type and location of the danger. It links wirelessly with other First Alert or BRK alarms.
- Voice alerts with location
- Wireless interconnect with up to 12 other First Alert or BRK alarms and 6 other compatible devices
- Replaceable AA batteries