Bests & Worsts Reviews from Amazon

I've read a lot of bad reviews that were based on bad information. I checked the manufacture date right away when I opened it, which I suggest you do too. I purchased this in October 2016. My manufacture date was July 2016. Can't expect much better than that. Make sure you check that when you get yours but it looks like Amazon has fixed the issue of sending out old items. Another big issue I read was people saying the alarm was not going off when they had readings. They clearly did not read the manual. ALL home CO alarms will have a delay before alarming. It says this clearly in the manual. It breaks it down into different groups in how fast it will alarm based on how much of a reading it will get. This prevents a small reading from something like a cigarette or from the oven door opening shortly from setting off the alarm and being an annoyance. The battery issue I will have to update on. I'm using the wall plug but people have complained about it draining battery still then. Now onto my review. I like the fact that it can be mounted several different ways. If you want to plug it straight into the wall you can and that's how it comes set up. The plug can be removed and there is a cord so you can hang it on a wall away from a wall socket (hardware included). The plug can be rotated so if you have a horizontal plug you can hang it vertical still. It is kind of large but it only covers one socket when plugged into the bottom socket. I like that it has a screen and stores peak CO readings so you'll know if there is any CO getting into areas where it shouldn't. I haven't had any issues with it yet and I assume it's working because I'm not dead yet. I'll update after a few weeks when I figure out if there is an issue with the battery drainage. Comes with a battery and hardware to hang it.