First Alert SMCO100 / SMCO200V Combo vs First Alert SMICO100-AC Hardwired Combo
Side-by-side specs from each maker.
Only the differences are shown.
| First Alert SMCO100 / SMCO200V Combo | First Alert SMICO100-AC Hardwired Combo | |
|---|---|---|
| Type | Smoke or CO alarm | Smoke or CO alarm |
| Alarm | combo | combo |
| Sensor | Photoelectric (smoke) and electrochemica | Ionization (smoke) and electrochemical |
| Power | AA (2 alkaline, replaceable) | Hardwired with 9V alkaline battery backup (replaceable) |
| Interconnect | Not listed | wired |
| Replace after | 10 years | Not listed |
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
First Alert SMICO100-AC Hardwired Combo
A hardwired smoke and CO combo alarm with a 9V battery backup. It uses an ionization smoke sensor and an electrochemical CO sensor, and interconnects by wire with other compatible alarms.
- Hardwired interconnect with up to 12 other First Alert or BRK alarms and 6 other compatible devices
- 9V battery backup
- 10 year limited warranty
- Smoke sensing is ionization only
- Needs wiring into household power