Universal Security Instruments MCND401 M Series Plug-In Carbon Monoxide and Natural Gas Alarm with 9-Volt Battery Backup

It saved my families life. Snow blocked the roif vent cutting off fresh air feed to the furnace. Gas leaking and CO 2. This alarm went off and we were able to get pets put and ourselves. Money well spent.

This company makes faulty detectors. I recently had one go off indicating a carbon monoxide leak. I immediately called the fire department and upon inspection of my home, I was told there was no leak and that the detector was faulty. I'm calling the company and demanding my money back. This is disgusting. Update: Company offered me replacements.... I blatantly responded to a reps email asking her why would I want more defective crap? I am now up at 1:30 AM because the 2nd one I bought started beeping. We didn't call the fire department but replaced it with a First Alert detector we had and so far, no beeping. This is unacceptable and I'm going to get to the bottom this somehow with reporting them to the proper authorities. This is insane.

Easy to use, reliable, sturdy.

I have received two of these from the company both started beeping within a day if getting them.. they didn't work properly I replaced the battery and the next day it would beeping again. I have other CO detectors in my home so I know these are just faulty. Frustrating for the expense of these they they didnt work properly.

Great item

Быстрая и аккуратная доставка . Еще не пробовал как работает , но тест клавиша показала что он пищит так что спящего разбудит. Проста надо учесть что она работает на 120 В , хорошо б что она работает на кроне батарее. Fast and accurate delivery. Have not tried how it works, but the test showed that he was a key beeps so that the sleep wake. Just have to take into account that it is working on a 120, well used that it works on the crown of the battery

I have a total of 3 CO alarms in my house at various spots. This one has been giving false alarms from time to time. I know this because the other two do not alarm when this one does. In fact, I put this next to one and it was registering 50 to 55 ppm when the other one was registering zero. I had the same kind before and it did not have a problem. I think this one is just faulty and I would like to know if there is a way I can get a replacement. I bought it in December of 2018 so it is less than one year old..

Have had this Universal Monitor in use for the past 10 yrs and it has served its purpose. Twice it has alarmed when there was a problem that could have been dangerous situation. I highly recommend the use as it serves a double duty.