First Alert SMCO100 / SMCO200V Combo vs Ring Alarm Smoke & CO Listener
Side-by-side specs from each maker.
Only the differences are shown.
| First Alert SMCO100 / SMCO200V Combo | Ring Alarm Smoke & CO Listener | |
|---|---|---|
| Type | Smoke or CO alarm | Smoke or CO alarm |
| Alarm | combo | listener |
| Sensor | Photoelectric (smoke) and electrochemica | Not listed |
| Power | AA (2 alkaline, replaceable) | 3V lithium battery (included, non-rechargeable) |
| Replace after | 10 years | Not listed |
| Maker's warnings | Not listed | the device does not detect fire, smoke or carbon monoxide. It hears the sirens of existing smoke or CO alarms. Requires the Ring Alarm or Alarm Pro kit (sold separately). Ring advises placing it within 6 inches of existing alarms. |
First Alert SMCO100 / SMCO200V Combo
A battery-powered smoke and CO combo alarm that runs on two replaceable AA batteries. The maker says the unit itself should be replaced at least every 10 years.
- Replaceable AA batteries
- The maker lists a replacement interval of at least every 10 years
Ring Alarm Smoke & CO Listener
An add-on sensor for a Ring Alarm system that listens for the siren of a smoke or CO alarm you already have and sends a phone notification. It is not a smoke or CO alarm itself.
- Adds phone notifications to existing alarms
- Z-Wave connection to the Ring base station (250 ft range per Ring)
- Battery included
- Does not detect smoke or CO itself
- Needs a Ring Alarm or Alarm Pro kit