First Alert CO400 Battery Powered Carbon Monoxide Alarm
List Price: $27.99

Our Price: $14.95

You Save: $13.04 (47%)


Product Description

Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air.

The First Alert CO400 carbon monoxide alarm uses an electrochemical carbon monoxide sensor-the most accurate technology available. The permanent sensor lasts up to five years. It is powered by two AA replaceable alkaline batteries giving you peace of mind even during power outages. The test/silence button both silences the alarm and allows you to test its functionality. The unit monitors and re-alarms if carbon monoxide levels persist sounding a loud 85-decibel horn. No installation is required and the attractive design allows the unit to be placed anywhere you need it. It includes an optional wall mount with no outlet required. An audible and visual low battery signal alerts you to replace the battery. Pull down action chart has convenient guide on what to do if an alarm sounds. 5 year limited warranty. UL listed. --Bree Norlander

What's in the Box
One carbon monoxide alarm, user's manual, and two AA batteries

  • Battery-operated carbon monoxide alarm
  • Uses electrochemical carbon monoxide sensor--the most accurate technology available
  • Simple to use silence/test button; low battery warning; end-of-life timer
  • 2 AA batteries included
  • 5 year limited warranty

Customer Reviews:

  • CO ALARM - everyone w/gas should have one
    We tested it on the truck's exhaust and it went off at about 60 ppm according to our digital CO Meter.

    This is the least expensive model, so we hope at this price everyone should have one in their home and garage....more info
  • A must have for your home
    Put this up in my home and it simply works great. What price can you put on piece of mind? A must have for your home.
    ...more info
  • Carbon monoxide alarm
    This was an added accessory to my smoke alarm at home. I have three of those--1 on each floor, so I needed to add a carbon monoxide alarm for added security. I hear it's one of the deadly killers in America and with a young son at home, I didn't wanna be without one. It's easy to install and its battery operated....more info
  • carbon monoxide detector
    Haven't had to use it yet. It was delivered on time and packaged well.
    I didn't have any problems with the transaction at all. I got it to use in my daughters car because she thought she may have a leak, due to the fact that whenever she drove, she became very tired. I guess if the alarm goes off, she will surely wake up, with as loud as they are!!...more info
  • Simple to install
    I bought 2 because new regulations in my state require one within 10 feet of each bedroom and I'd only had one on the first floor before. Good price, easy to install....more info
  • less is more
    I ordered 2 of these because my local home improvement stores have been sold out since a recent scare in my area. They had plenty of more expensive combo models (CO/smoke, CO/heat, etc.) but all I wanted was this one. It is perfectly simple. Easy to install, easy to maintain and very economical. I assume it works because it hasn't gone off and I haven't woke up dead yet! The test button indicates it's working properly and the battery is easy to change. ...more info
  • Cheap junk -- your family's safety is worth more.
    I bought this along with the more expensive First Alert CO410 model to replace two Kidde-brand models which had died within two years of purchase. I figured a different brand had to be better, right?


    I put in fresh batteries, and this one started making a squealing noise, somewhere between a proper alarm and a sick baby. Something was clearly not right, and no amount of pushing buttons or changing batteries would help.

    The other more expensive model was no better -- its fancy LCD panel displayed random meaningless lines rather than letters or numbers (similar to the way the Kidde models had failed, in fact), and similarly refused to be reset to a sane state.

    I don't know about you, but that's all the chances I'm willing to give First Alert. If the two I got were so broken out of the box, how can I possibly trust any replacement?

    So I don't know what I'm going to get, but it won't be from either First Alert or Kidde....more info
  • Get one.
    I'm alive today because of one of these gizmos. It's as simple as that....more info
  • safety
    First Alert carbon monoxide detector is worth the investment. It is easy to set up and brings peace of mindcarbon monoxide detector...more info
  • Read the fine print
    I purchased this device to measure carbon monoxide on my sailboat. Nowhere in the description of the product does it state that it is not suitable for marine use. Upon receipt, the instructions specify that it is not for marine use. In addition, I wanted to know if it actually responded to carbon monoxide, so I intended to put it in the garage with my car running. Whoops, you cannot do that either. It has a notice that says that if you try testing the device as I intended, it will void the warranty.

    Now, do you think I should use this in my boat to protect my family?

    Probably not....more info