| Brand | First Alert |
|---|---|
| Battery Included | Yes |
| Year Manufactured | 2025 |
| Country of Origin | Mexico |
| Power Source | Battery |
| Model | CO400 |
| Color | White |
| Features | Electrochemical Carbon Monoxide Sensor |
| Type | Carbon Monoxide Detector |
Check the listing for details. First Alert Carbon Monoxide Alarm 2 Pack White CO400 Battery Operated Open Box. Color: White, Condition: Used, Made in Mexico. Listed at 11.69 USD. • First Alert Model CO400 battery-operated carbon monoxide alarms. • Includes two white alarm units, two 9V batteries, mounting hardware, and user manual. • Compact, oval-shaped design suitable for wall or ceiling mounting.
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