[2-Pack] 4in1 Plug in Carbon Monoxide Detector & Natural Gas Combination Detectors CO Gas Temp Humidity with 2.1'' HD Screen & Indicator, Propane, Methane Combustible Gas Alarm,White

This offers great value for the price. It’s reassuring to have added safety at home. Simple to set up and the screen display is awesome. The good thing is just need to plugs in instead of requiring a battery.

I have two of these one upstairs and one downstairs. I’m guessing it works pretty well, they are pretty sensitive to smells though that I wouldn’t think it picking up. Mine goes off after my daughter sprays her perfume or if you spray some kind of aerosol. Since we got it it has read 0 for carbon monoxide.

Easy to use and clear display. Gives extra peace of mind knowing there is no harmful gasses in the house. I like that the screen is dimmable so it's not so bright at night. ****Update: from 5 stars to 1 star!!! One of them started beeping for NO GOOD reason. I swapped it for the other one and it didn't detect anything. Then plugged in the defective one again and it starts beeping again. I think the cheap sensor gave out after only owning it 3 months! Don't waste your money on defective ultra cheap stuff that is there to save your life.

Nice compact design,easy to setup,,display is easy to read,great value for the money.

Ordered 2 and 1 malfunctioned after 2 weeks.

Came package nicely with directions- easy to use and test! Not too big, we have one in the kitchen and one upstairs at the top of our steps. Reasonably priced!

No sé si es que están defectuosos o que son demasiado sensibles pero suenas en cualquier momento incluyendo la madrugada. Lógicamente despertando a todo, ya todo ignora el aviso y eso no es bueno que pase. Veo en los comentarios que a otras personas le ha pasado también.

Sure look way better than the boring old monitors, plus give a lot more information than some LED lights. My only complaint is I wish I could rotate it so it could go in a top plug; the display doesn't detect orientation. if you are in a top plug it will block the bottom one.