








🚨 Don’t just detect CO—dominate your home safety game!
The First Alert CO400 is a battery-powered carbon monoxide alarm featuring an advanced electrochemical sensor for the most accurate detection. Compact and easy to install, it includes a silence/test button, low battery warning, and a 5-year end-of-life timer, backed by a 5-year limited warranty. Designed for reliable, wireless home safety with peace of mind.




| Brand | First Alert |
| Style | Simple |
| Power Source | Battery Powered |
| Colour | White |
| Product Dimensions | 2.5D x 12.7W x 7.6H Centimeters |
| Item Weight | 0.45 Pounds |
| Alarm | Audible |
| Operating Humidity | 10-95% RH |
| Sensor Type | Electrochemical |
| Global Trade Identification Number | 00029054000699 |
| Material | Multi |
| Number of Items | 1 |
| Manufacturer | Jarden Safety |
| UPC | 029054000699 |
| Department | Electronics |
| Country of Origin | USA |
| Item model number | CO400 |
| ASIN | B000N8OYXI |
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