First Alert CO400 front view

Specs

Color
White
Model
CO400
Product group
Home Improvement
Size
Pack of 1

First Alert CO400 Battery Carbon Monoxide Alarm White

First Alert
$21.95 $21.99 Typical price Checked 7 hours ago
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Minimum Average Maximum

  • Keep your family safe with this easy to
  • Features an advanced electrochemical
  • A loud 85 decibel alarm sounds when CO
  • To ensure complete protection make sure
  • 5-year limited warranty

About this product

This white, battery-operated detector utilizes an advanced electrochemical sensor to accurately detect carbon monoxide. The unit produces a loud 85-decibel alarm when dangerous levels are reached, ensuring your family is alerted immediately to potential threats.

Engineered for reliability, the CO400 includes an end-of-life signal chirp to indicate when the unit requires replacement. It is rigorously tested to meet UL standards and comes with a 5-year limited warranty, reflecting First Alert's long-standing commitment to home safety.

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Questions

How does the First Alert CO400 handle power failures?

Because it is battery-operated, the First Alert CO400 continues to monitor carbon monoxide levels even if your home experiences a total power outage.

Where should I install this carbon monoxide alarm?

For complete home protection, First Alert recommends placing a CO400 alarm on every level of your house and inside each individual bedroom.

How will I know when to replace my First Alert CO400?

The device features an end-of-life signal chirp that alerts you when the sensor or unit has reached the end of its operational lifespan and needs to be replaced.

What volume level does the alarm emit?

The First Alert CO400 sounds a loud 85-decibel alarm to ensure it is audible throughout your home when dangerous carbon monoxide levels are detected.