First Alert CO400 Carbon Monoxide Detector, Battery Operated, 1-Pack
4.7
(16k+ ratings)
This carbon monoxide alarm features an advanced electrochemical sensor for accurate detection and is powered by a 9V replaceable battery, ensuring functionality during power outages. It emits a loud 85-decibel alarm when CO levels are dangerous and includes a test/silence button. The unit requires no installation and can be placed anywhere, with an optional wall mount. It has a 5-year sensor life, a low battery alert, and a 5-year limited warranty. UL listed for safety compliance.
What customers like:
- Tested fine and works great
- Easy to replace old detectors with new ones
- Comes with a 9volt battery
- Battery lasts a long time
- Small and easy to mount
- Easy to test
- Essential for safety especially for those with past carbon monoxide exposure
- Fair price
What customers dislike:
- Some users may mistakenly think it plugs into a wall socket
- Requires screws for mounting if not placed on a surface
