First Alert SMICO110 10-Year Smoke and CO Alarm
- Power Source: Battery
- Sensor Type: Ionization
- Alarm: Combination Alarm
- Product Style: Modern
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A low-maintenance 2-in-1 smoke and CO alarm for anyone who wants both hazards covered by a single sealed unit.
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ASIN: B0CJMNJ6GFModel: SMICO110Category: Smoke Detectors & Fire Alarms
Overview
This First Alert alarm is a combination smoke and carbon monoxide detector running on a sealed 10 year battery, giving 2-in-1 protection in a single unit with no battery changes for a decade.
Combining both sensors into one sealed unit trades some flexibility (no separate placement for smoke versus CO sensing) for simpler installation and long-term upkeep, since there is only one alarm to mount and no battery to ever swap. An end-of-life warning is the built-in cue for when the whole unit, not just a battery, needs replacing.
- Combination smoke and CO detection
- Sealed 10 year battery
- Precision Detection sensing
- End-of-life warning
Who it's for
Works well for a homeowner wanting one alarm that covers both smoke and CO in a bedroom, hallway, or near a furnace or garage, without dealing with wiring or battery maintenance. Someone needing hardwired interconnection across a house should choose a hardwired combination model instead.
Pros and cons
- 2-in-1 smoke and carbon monoxide protection
- Sealed 10 year battery, no replacements
- End-of-life warning built in
- Simple installation with no wiring
- Not hardwired, so no interconnection with other alarms
- Lower rating than some other alarms in this lineup
Performance notes
Precision Detection sensing is built to reduce false alarms triggered by cooking smoke while still responding early to genuine fire conditions, and the electrochemical side of the sensor handles carbon monoxide. The sealed 10 year battery removes the chirp-and-replace cycle entirely, with an end-of-life warning as the eventual signal to swap the whole alarm.
Specifications
| Brand | First Alert |
|---|---|
| Model | SMICO110 |
| Dimensions & fit | |
| Item Weight | 0.7 pounds |
| Item Dimensions D X W X H | 5.6 × 5.6 × 2 inches |
| Power & efficiency | |
| Power Source | Battery |
| Battery Average Life | 10 years |
| Construction & materials | |
| Color | White |
| Warranty & support | |
| Manufacturer Warranty Description | 10 year limited |
| Other details | |
| Sensor Type | Ionization |
| Alarm | Combination Alarm |
| Product Style | Modern |
| Number Of Items | 1 |
| Mfr Part Number | SMICO110 |
| Item Type Name | Combination Alarm |
Closest rivals on specs
Kidde 20SD10 10-Year Battery Smoke Detector- Item Weight 0.7 vs 0.6 pounds (+17%)
Kidde 20SA10 Hardwired Smoke Detector 10-Year Backup- Item Weight 0.7 vs 0.59 pounds (+19%)
Kidde 20SDR Battery Smoke Detector- Item Weight 0.7 vs 0.84 pounds (-17%)
Frequently asked questions
Does this First Alert alarm detect both smoke and carbon monoxide?
Yes, it is a 2-in-1 unit that covers both smoke and carbon monoxide with a single sealed battery.
Can this alarm be wired into household power?
No, it runs entirely on its sealed 10 year battery and is not a hardwired unit.
How do you know when this alarm needs to be replaced?
It has an end-of-life warning that signals when the unit itself is due for replacement, since the battery is sealed for the life of the alarm.