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.
Alarm spec sheet
| Type | Smoke and CO combo |
|---|---|
| Sensor | Ionization (smoke) and electrochemical |
| Power | Hardwired with 9V alkaline battery backup (replaceable) |
| Interconnect | Wired |
Listed features
- Hardwired interconnect with up to 12 other First Alert or BRK alarms and 6 other compatible devices
- 9V battery backup
- 10 year limited warranty
Worth checking
- Smoke sensing is ionization only
- Needs wiring into household power
Where to buy the SMICO100-AC Hardwired Combo
Prices and availability change. We may earn a commission from some links.
- Check for recalls: Search the agency's recall list with the model number and date code from the label: CPSC recall search.
- Use and supervision: follow the maker's warnings on the product, and see CPSC's Safe Nursery guide. Check the label and the maker's instructions, and ask your pediatrician about your child.
Full specs
| First Alert SMICO100-AC Hardwired Combo | |
|---|---|
| Type | Smoke or CO alarm |
| Alarm | combo |
| Sensor | Ionization (smoke) and electrochemical |
| Power | Hardwired with 9V alkaline battery backup (replaceable) |
| Interconnect | wired |
Compare the SMICO100-AC Hardwired Combo with
How each closest rival differs from the SMICO100-AC Hardwired Combo, from the makers' specs.
- First AlertSMCO210 / SMCO210V ComboCompare side by side
- First AlertSMCO500V ComboCompare side by side
- First AlertSM210 / SM210V / SM210L 10-Year Smoke10-yearCompare side by side
- First AlertSMCO100 / SMCO200V Combo10-yearCompare side by side
SMICO100-AC Hardwired Combo: questions answered
From First Alert's published specs, last checked 2026-11-11.
Where should the First Alert SMICO100-AC Hardwired Combo go?
Use and supervision: follow the maker's warnings on the product, and see the AAP's safety and prevention pages. Check the label and the maker's instructions, and ask your pediatrician about your child.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.
More smoke and CO alarms
- First AlertSMI100-AC Hardwired Smoke
- First AlertSC5 Smart Smoke & CO
- First Alert10-Year Battery Photoelectric Smoke Alarm, Slim Profile
- First AlertCO400 Battery Carbon Monoxide Alarm
- First AlertCO605 Plug-in Carbon Monoxide Alarm
- First AlertCO710 Carbon Monoxide Alarm with Digital Temperature Display
Where these specs come from
Last checked 2026-11-11. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.