2 in 1 CO & Smoke Alarm,Carbon Monoxide Detectors, with Battery, Smoke Detector,85dB in Alarm,for Home and Kitchen,LCD Screen,Easy to Install

I bought them and they work great.

Hello All,The OLUNCLE Two-In-One Smoke and Carbon Monoxide Detector is a breeze to set up in an effortless plug-and-play straight out of the retail box. It comes with 2 AA generic batteries to install on the rear backing of the unit. Although, there isn't a direct battery cover hatch like with most electronics for some reason or another. The circular ceiling rear mounting plate nonetheless doubles to cover over the exposed set of AA batteries all the same.I chose not to mount to the ceiling my smoke / monoxide detector and kept it on top of my refrigerator in a basket instead. The unit is quite compact and weighs a few ounces with a shrieking TEST button on the front face plate with an electronic LED display. Be sure to be a few feet away or turn the unit away from you when you press the TEST button, it's that extremely loud.The unit comes with a set of aluminum small screws with a set of plastic mounts for the screws. The instructions are only in English with a legible font size overall.

Buen funcionamiento

box came with 4 detectors, one was broken upon arrival. It constantly alerts of fire, even when outside in the driveway. I do not know how to request a replacement of just the one as I have already installed the other three. This happens and If I can get a single replacement, I will update my review.Seller reached out to me and sent me a replacement for the defective unit at no cost. I am upgrading my review to 4 starts from 3. Good seller, would do business with again.

I was skeptical about these because they were kinda cheap and well I just needed them in a pitch. But hey they are awsome.They give my family a peace of mind, batter life has been amazing so far and the sound level is perfect for our big home.These were also super easy to mount and came with all the hardware to do so, so that's a major plus. Highly recommend these

I bought this fire alarm, installed it myself, and guess what? I didn’t need no man to help! That’s right—just me, a screwdriver, and sheer determination. Installation was a breeze, and I only had to double-check the instructions once (okay, maybe twice).The alarm itself is very enthusiastic about keeping me safe—so much so that it screams at me every time I slightly over-toast my bread. But hey, better safe than sorry, right? At least I know it works! The battery backup is a nice touch, so I can rest easy knowing it’ll yell at me whether the power is on or not.Overall, a solid fire alarm. Just be prepared for it to judge your cooking skills.

Best smoke and carbon monoxide detector I've ever had.

It seems to work