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🏠 Stay one step ahead of danger with First Alert’s silent guardian!
The First Alert CO400 is a battery-powered carbon monoxide detector featuring an advanced electrochemical sensor for precise detection. It delivers a loud 85 dB alarm to alert you instantly of dangerous CO levels, operates independently of power outages with a replaceable 9V battery, and includes smart low battery alerts. Designed for easy placement without wiring, it offers up to 5 years of sensor life backed by a 5-year limited warranty, making it an essential, reliable safety device for every home.
| ASIN | B000N8OYXI |
| Alarm | Audible |
| Best Sellers Rank | #391 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Carbon Monoxide Detectors |
| Brand | First Alert |
| Built-In Media | Alarm; Mounting Bracket; User Manual; 9V Battery |
| Color | White |
| Customer Reviews | 4.6 out of 5 stars 23,065 Reviews |
| Enclosure Material | Multi |
| Global Trade Identification Number | 00029054000699 |
| Item Dimensions D x W x H | 1"D x 5"W x 3"H |
| Item Type Name | First Alert CO400FF Battery Powered Carbon Monoxide Alarm |
| Item Weight | 11.2 ounces |
| Manufacturer | First Alert |
| Manufacturer Contact Information | 1 (800) 323-9005. |
| Manufacturer Warranty Description | 5 Year Limited Warranty |
| Mfr Part Number | CO400 |
| Model Number | CO400 |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered |
| Product Dimensions | 1"D x 5"W x 3"H |
| Product Style | Battery Powered |
| Sensor Type | Electrochemical |
| Style | Battery Powered |
| UPC | 029054000699 |
| Unit Count | 1 Count |
J**.
Simple, reliable, and essential for home safety
I recently purchased this First Alert CO400 detector to add another layer of safety to my home, and I’m very satisfied with the experience. What I appreciate most is the straightforward, battery-operated design. It was incredibly easy to set up—no hardwiring or complex installation required, which makes it perfect for placing exactly where you need it without worrying about electrical outlets. The unit feels sturdy and well-built, and the alarm is loud and impossible to miss. It provides great peace of mind, especially given how unobtrusive and reliable it has been since I installed it. For anyone looking for a no-fuss, effective way to monitor carbon monoxide levels in their living space, this is a solid, must-have product.
J**N
Great Carbon Monoxide Detector – Easy to Install and Reliable!
I bought two of the First Alert Carbon Monoxide Detectors (model CO400), and I’m very happy with them. They were super easy to install — no outlet needed since they run on batteries. I just mounted them on the wall, and they were ready to go in minutes.I like that the battery operation means I can place them anywhere in my home without worrying about finding a plug. The alarm is loud enough to hear clearly, and the design is compact and simple.It gives me peace of mind knowing my family is protected. Overall, great value, easy setup, and reliable safety product. Highly recommend!
H**E
Great Value for Peace of Mind
Great Value, easy to set up, peace of mind! Alarm is loud and indicator light functions well.
A**T
great value and easy to set up
GREAT PRODUCT .GOOD PRICE
K**E
works as intended
works as intended, came with the batteries and hasn't malfunctioned yet. Good.
J**A
Good product
Since I bought a gas stove I just thought I needed this and I'm glad I have it. Seems to be a good product thus far
S**T
Good value
Good value
M**A
Battery operated only
Works as expected. It does not plug in. Battery only. Wish I had read a little better, but good product if you only use batteries.
Trustpilot
1 month ago
1 week ago