(4 pack) Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-COPP-B-LPM

Bought this to take on vacation after hearing so many horror stories about people dying from carbon monoxide poisoning in their hotels. The unit flashes every 30 seconds or so to let you know it's working and it's small enough to pack in along with your other gadgets. It has a nifty design that won't allow you to close the cover without batteries installed, so that's a great feature. Now that I'm back home again, I keep the device by my beside.

Our last CO detector would beep intermittently for low battery and end of life, this new one has a display so I won't be guessing what the beep is telling me. It also tells the CO level with or without sounding the alarm, so you know when low levels are present as well. Another perk is that this has the same mounting plate as other Kidde detectors so no new mounting screws were needed, it fits right where the old model was mounted.

Highly recommend this CO2 detector especially if you have a gas furnace! We had an old alarm but I wasn't sure if it was working (it wasn't ) %26 I thought I smelled something when we turned the furnace on. We shut the furnace off, bought this CO2 detector %26 turned the furnace back on while no one was home. I was only gone about an hour %26 half, when I got back I could hear the alarm going off before I even reached my front door! The ppm was over 300! This detector works well %26 I am SOO thankful I bought it, infact I ended up buying another one after this!

Kidde Battery Operated Carbon Monoxide Alarm - It's working but no idea if it's working correctly, but it hasn't gone off so I'm assuming that means no carbon monoxide in the house...yet if it's not working correctly, one would actually never know lol. Thanks though for making me feel better since it hasn't gone off 🙂.

I got these to replace my old ones, after the 10-year life span. They were essentially the same brand and model number, so I was able to use the old mounting brackets, so they just slid into where the old ones were removed from. I should get another 10 years from them, hopefully, as long as I live that long and have no CO incidents.

Seems to work well. I almost bought an “off brand” detector but on second thought, decided to go with the Kidde. I fell like something like this, which can save your life, isn't something you should buy just based on price. My last Kidde carbon monoxide detector lasted 15 years before giving the “end of life” light on the display, I'd be more than satisfied if this one gives me half that

Items were exactly as described online. The process from ordering to picup at was smooth and quick. Installation was a breeze. Instructions were clear and all fastening hardware, including batteries were supplied. So far, both items are working fine. Overall I'm very pleased with the items themselves and the way Walmart handled the transaction.

I have confidence in the Kidde brand. It's been around more than 100 years. I didn't know this alarm was in the house until it went off. I bought this house in 2017. Because it had been a rental, I replaced and upgraded all the alarms at that time. Two weeks ago, March 2025, I heard a quiet beeping I couldn't locate. I checked all my alarms and they were still good, so I went hunting through the house. In my dimly lit furnace room I found the source, an alarm just like this one hanging on the wall next to the furnace. I unmounted it and took it upstairs where the light was better. I checked the batteries and they were like new. Then I spotted a date stamp, March 2015, two years before I got here. I went online and found that the code showing on the LCD display meant "End of Life" and the alarm was designed to last ten years. I bought the new one, hung it on the mounting screws of its predecessor, and I assume it'll beep in ten years, even earlier if it sniffs some CO between now and then.

The battery compartment is defective. The batteries absolutely will not fit into the metal holders. I tried multiple times, and the holders are too rigid. On the last try, I used just a little bit of force, and the battery got extremely hot. I'm afraid to use this and will be returning it.

The description is misleading. I made the purchase because the ad said that the alarm would trigger at a lower detection reading than it actually does.