First Alert SMICO100-AC Hardwire Smoke and CO Alarm
- Power Source: Corded Electric
- Sensor Type: Ionization
- Alarm: Smoke, CO
- Item Weight: 1.7 pounds
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A practical replacement unit if a hardwired alarm harness is already in place, since the Quick Connect Plug turns the swap into an unscrew-and-reconnect job.
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ASIN: B0CLVQF7MCModel: SMICO100-ACCategory: Carbon Monoxide Detectors
Overview
Hardwired First Alert combination smoke and CO alarm that connects with a Quick Connect Plug instead of spliced wiring, aimed at swapping into an existing hardwired alarm harness rather than a fresh installation.
The listed description field is empty, so the useful detail comes from the bullet specs: Precision Detection tuned to cut cooking-triggered nuisance alarms, an interconnect that sounds every compatible alarm together, and a plug harness meant to replace an already-wired alarm without rewiring the electrical box.
- Quick Connect plug swaps in without rewiring
- Precision Detection cuts cooking-related nuisance alarms
- Interconnects so all compatible alarms sound together
- Test/silence button for routine checks
Who it's for
Someone replacing an aging hardwired smoke or CO alarm who wants the swap to skip rewiring, and who has or is adding other interconnected alarms. Not for a home with no existing hardwired alarm wiring.
Pros and cons
- Quick Connect Plug swaps into an existing harness without splicing wires
- Precision Detection aims to cut cooking-related nuisance alarms
- Interconnects so every compatible alarm sounds together
- Battery backup covers detection during power outages
- Still needs an existing hardwired alarm setup to connect to
- No digital display or numeric CO reading
- Interconnect scope depends on which alarms are compatible
Performance notes
Precision Detection technology is tuned against the industry standard for reducing cooking-smoke false alarms, so it should trip less often from a stovetop than an older ionization-only unit. The interconnect wiring means one alarm sensing smoke or CO sets off every compatible alarm on the same circuit, and the test/silence button lets a household check or quiet a unit without pulling it down.
Specifications
| Brand | First Alert |
|---|---|
| Model | SMICO100-AC |
| Dimensions & fit | |
| Item Weight | 1.7 pounds |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Color | White |
| Included components | |
| Unit Count | 3 |
| Other details | |
| Sensor Type | Ionization |
| Alarm | Smoke, CO |
| Number Of Items | 3 |
| Product Style | Precision Detection |
| Mfr Part Number | SMICO100-AC |
| Builtin Media | Easy Adapter Plug, 9V Battery |
| Item Type Name | Combination Alarm |
| Item Highlight | SMICO100-AC |
Frequently asked questions
Does installing the First Alert SMICO100-AC require rewiring?
No, its Quick Connect Plug attaches to the wiring harness already in a hardwired alarm's electrical box, so it swaps in without splicing wires.
Will the SMICO100-AC set off other alarms in the house?
Yes, through its early warning interconnect, when one alarm sounds, every compatible alarm on the circuit sounds too.
What happens to the SMICO100-AC during a power outage?
Its battery backup keeps it monitoring and able to alarm even when household power is out.