First Alert CO400 Carbon Monoxide Detector

No, the CO400 is entirely battery-powered. This makes installation straightforward since you can mount it anywhere without needing an electrician or access to an outlet.

Yes. Because it runs on a 9-volt battery, it provides continuous monitoring even during a power outage, ensuring your home remains protected when you need it most.

The unit features an end-of-life signal that will alert you when it is time to replace the detector. This ensures you are never relying on an expired sensor.

Yes, the device includes a single button that functions as both a test button and a silence feature, allowing you to quickly mute unwanted alarms.

For comprehensive protection, you should install a detector on every level of your home and inside every bedroom. Carbon monoxide is odorless and colorless, so having multiple units is the safest approach.

This model uses an advanced electrochemical sensor. This is a highly accurate, industry-standard technology designed specifically to detect carbon monoxide levels from sources like faulty appliances.