First Alert CO410 Battery CO Alarm with Display
- Electrochemical CO sensor
- 85 dB alarm
- Backlit digital display with peak level
- 2 AA batteries, included
- 7 year limited warranty, end of life chirp
- 1.5 x 5 x 3.4 inches, tabletop or wall
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A battery carbon monoxide alarm with a digital readout and peak memory that works through power outages. It covers CO only, so you still need smoke alarms.
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ASIN: B000OCSAUQModel: CO410Category: Carbon Monoxide Detectors
Overview
An electrochemical sensor reads carbon monoxide in the air and shows the level on a backlit display. The First Alert alarm runs on batteries, rests on a shelf or hangs on the included wall mount, and sounds a loud horn when levels turn dangerous.
Seeing the actual CO level and the highest reading since reset is the reason to choose it over a plain alarm. Battery power covers outages. It detects only carbon monoxide, not smoke.
Who it's for
Homes with gas furnaces, water heaters or attached garages benefit from a unit on every level and in bedrooms. People wanting one device for smoke and CO need a combination alarm.
Pros and cons
- Digital display shows CO level
- Peak level memory
- Works during power outages
- No installation required
- Detects CO only, not smoke
- Batteries need periodic changes
- No interconnect listed
Performance notes
The electrochemical sensor reacts to CO concentration, and the alarm sounds when levels persist at danger thresholds. Placement matters: one per level and per bedroom gives complete coverage. The sensor ages, and the end of life chirp marks when to replace the unit.
Specifications
| Brand | First Alert |
|---|---|
| Model | CO410 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.5 x 5 x 3.4 inches |
| Item weight | 236 g |
| Power & efficiency | |
| Power Source | Battery powered, 2 AA (included) |
| Construction & materials | |
| Color | White |
| Enclosure Material | iphone |
| Compatibility & installation | |
| Compatible Devices | Tabletop or optional wall mount (included) |
| Included components | |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 7 year limited warranty |
| Other details | |
| Sensor Type | Electrochemical |
| Alarm | Carbon monoxide, 85 dB |
| Builtin Media | Backlit digital display with peak level |
| Specification met | UL standards |
| Item Highlight | CO410 |
| Product Style | Carbon Monoxide Detector Alarm |
Frequently asked questions
How big is the First Alert CO410?
It measures 1.5 x 5 x 3.4 inches and weighs 236 g.
Does the First Alert CO410 detect smoke?
No. It is a carbon monoxide alarm only.
Does the First Alert CO410 come with batteries?
Yes. It uses two AA batteries, which are included, and has an access door to change them without dismounting.
How long does the First Alert CO410 last?
It has a 7 year limited warranty and an end of life chirp that signals when to replace it.