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

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! Read more

this is an easy to install battery operated co detector that functions as an alert system against the odorless and colorless co. this provides my family with peace of mind. the device is compact and easy to read if there is co detected. the batteries are easy to replace. Read more

I was able to easily mount it to my wall. Seems reliable, glad it comes with batteries. Price is reasonable! Alarm sound is super loud and it’s easy to test. Overall I’m satisfied and I’m glad I made this purchase. I feel secure knowing this is in my house. Read more

Work great but was to replace two that stopped functioning and never game any sort of warning beep. Hopefully these do a better job. Read more

I purchased two packs of the pack of 2. So far so good!? Tested fine. Hope it actually works, which is why I went with a name brand. This is not the place to skimp. The C0400 carbon monoxide detector comes with a 9 volt battery. I knew I needed to replace my existing detector (they dont last forever, and need to be replaced ever so often) and I did not want the plug in style. I wanted battery operated so I could place it wherever I wanted and not be limited to available outlets. I also bought a second pack as a gift. I prefer giving practical, functional gifts, especially stuff that people tend to not want to buy, such as smoke alarms, fire extinguishers, carbon monoxide detectors. If you travel, consider a battery operated detector such as this. Dont trust that a hotel room has you covered, or someone else's house. It is small and light weight enough that it should be the thing to pack (take out battery, store separately until in room). I will likely buy an additional pack. Right now I have one on the first floor, and one outside my second floor bedroom door. I think having one in the basement and another in actual bedroom or elsewhere (spread out) would be better. Watch for sales, but if need be just buy them at any cost so you have them. I am even thinking about adding one to my winter car kit. If ever stuck in a blizzard and had to stay in my car for any length of time, having a detector will help as CO2 levels can quickly rise if running car (or if a few people are simply breathing without the window open a crack) to keep warm. Tail pipes can easily clog especially if windy. So yeh, simple thing to stay safe and alive Read more

Excellent value for a great product. Read more

Works as described. I'm happy with this product. Read more

I bought this one to replace an eight year old unit that was essentially the same. It’s great, with only one minor problem. The cheap battery included in the packaging started the low battery warning chirp immediately. Spend a couple more dollars and get a quality 9v. Throw the included battery away. Read more