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First Alert CO400 Battery Powered Carbon Monoxide Detector

About this item


  • Keep your family safe with this easy to use, battery operated carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
  • Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
  • A loud 85-decibel alarm sounds when CO levels reach dangerous levels
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 5-7 year limited warranty; equipped with end-of-life signal chirp, so you know when it's time to replace the unit for safety
  • All First Alert CO alarms are rigorously tested to meet UL standards


Dimensions (Overall): 3.38 Inches (H) x 4.87 Inches (W) x 1.56 Inches (D)

Weight: .45 Pounds

Includes: Battery

Features: Silences Unwanted Alarms

Package Quantity: 1

Requires Hardwired Installation: No

Battery: 1 9-Volt Alkaline, Required, Included

Warranty: 7 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869

TCIN: 11134898
UPC: 029054013101
Item Number (DPCI): 085-14-0248
Origin: Imported


The First Alert CO400 Carbon Monoxide Alarm utilizes an electrochemical carbon monoxide sensor to monitor your space for a carbon monoxide threat. The battery-powered design doesn't require an electrician; simply insert the included 9-volt battery, and the carbon monoxide detector is ready to go.

The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel-burning appliances, blocked chimneys, and generators running inside or too close to homes. When CO levels become elevated, a loud 85-decibel alarm alerts you to the threat.

Because CO evenly distributes itself, it's important to have a CO detector on every level and in every bedroom of your home. Designed to be simple to use, the CO detector has just one button that silences or tests the unit, as well as an end-of-life timer that lets you know when it's time to replace the device.

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Shipping details

Estimated ship dimensions: 8.42 inches length x 6.69 inches width x 2.71 inches height
Estimated ship weight: 0.47 pounds

Return details

This item can be returned to any Target store or Target.com.
This item must be returned within 90 days of the in-store purchase, ship date or online order pickup. See return policy for details.
See the return policy for complete information.

From the manufacturer

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Guest Ratings & Reviews

4.2 out of 5 stars with 83 reviews
88% would recommend
35 recommendations
value: 4.03 out of 5
quality: 3.72 out of 5

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