First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

This was really easy to install. I’m not too handy, but I did it all by myself. I tested the alarm and it made a very loud sound so I’d be able to hear it in an emergency. The best part is you don’t have to replace it for 10 years.

I'm just going to say...This device Literally, saved my and my family's life...The CO function went off, and basically notified us, and our apartment neighbor that there was a leak.10/10 would recommend.

Great product that helps to keep you safe at home with both smoke and CO2 detectors in one. And no battery beeping or changing as they come with a 10 year battery installed.

Had to return the first one because it was not operating correctly right out of the box. But the replacement came quickly, ready, and working. East to install.

This was a replacement for what I already had. The two I replaced did I good job so went with same.

And up I jumped out of bed, practically having a heart attack! This thing didn't make a sound, not a peep for the last two years of my diligent monthly tender loving care, testing and cleaning There it was with it's cute little occasional blink of it's green light, letting me know every things okay. How safe and secure I felt, that is, until it had a total nervous system break down. It was yelling and screaming at me unrelentless, not one beep, not two, not three, not even four, just constant screeching in my ears. The family was still in a tither even though we practiced time and time again. The supposed real deal was a bit different for each person. I'm glad I kept my cool. Down I brought it from the ceiling where it lived for the past two years and other old timers had lived there also for the past15. Follow the instructions, Dave, I said, to myself, as the rest of my family headed for the hills preparing to call the fire dept. Ok, ok! break tab and move switch to deactivate position. Hell! that was already done! What? Well why is it still going wild. I switched it to activate and it shut off. Certainly, naturally, you have to use your head in these type of situations. Wasn't that clever of me. Now in the new house of Poltergeist, I was using the advise the hero (The Rock) gave to his wife in Skyscraper. Switch it off, then switch it on, best way to fix all tech problems in a jiff, only with this I was switching it on to switch it off, it still didn't shut off completely and sounded off, every once in a while until I demolished it with my sledge hammer. I'll be calling now for a new, free of charge device, seeing it want hysterical, beyond belief on me. Here it come's all the questions and answers, they feed me, until I'm not believing it even happened. I bought the three pack and expect three new ones not one. I' mean I should have to go to bed each night, now wondering if the others are going to do the same thing. They certainly came from the same batch. I'll be expecting a run around about that, also. It's actually still moaning occasionally . It lasted one fifth of the ten years it was suppose to and they wanted me to rate it about a week after I bought it. Ha! I think you know what i have to say about this little device. It felt like the, Attack of the Machines, if there is such a movie. Wow! today I just got a glimpse of the future. DMA

Easy to install.

Worked great. Easy to install