First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack

Name: First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack
Brand: First Alert
SKU: awhd-us-b000n8oyxi
Price: 20.92 USD
Availability: InStock

Brand: First Alert

Condition: Used

$20⁹²

$22⁴⁹

-7% Save $1⁵⁷

Updated: 2 days ago

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Description

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.The alarm sequence should last 5-6 seconds. If it does not alarm, make sure fresh batteries are correctly installed, and test it again. If the unit still does not alarm, replace it immediately

A loud 85 decibel alarm sounds when CO levels reach dangerous , Battery Replaceable - Yes

To ensure complete protection make sure to place one on each level of your home and in each bedroom

5-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

First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

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Product Details

SKU:: awhd-us-b000n8oyxi
Model:: CO400
Country:: US
ASIN:: B000N8OYXI
GTIN:: 00029054000699
UPC:: 029054000699

Shopping Smarter

Common questions about buying open-box and refurbished.

Why buy refurbished or open-box?

Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $2 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.

What's the difference between open-box and refurbished?

Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.

Why use OpenBoxFox?

Finding refurbished deals is time-consuming — you'd have to check Amazon Warehouse, Reebelo, Dyson Outlet, and others separately for First Alert products. OpenBoxFox aggregates these listings in one place, so you can compare and find the best deal without the legwork. We update pricing daily so you always see current availability and real savings.

Is it safe to buy refurbished?

Yes. Products listed on OpenBoxFox come from established retailers like Amazon, Reebelo, and Dyson — not unknown third-party sellers. Each retailer has buyer protection policies, return windows, and in some cases warranties. You get the price advantage of used goods with the purchase security of a known retailer.