X-Sense Carbon Monoxide Detector Alarm with Digital LCD Display, Replaceable Battery CO Alarm Detector with Peak Value Memory, XC01-R

Excellent product, fantastic customer support. This is the perfect product for being either installed or used as portable. I travel and this has given me peace of mind in hotels I stay in.This device monitors carbon monoxide levels, has an alert alarm, is easily functional and is a good value for the cost.

Great product, small and efficient

Easy to install . Looks great and has lower profile than what i had. Value for the money considering that you only need to replace the battery 2x in its lifespan. Just install and it works immediately no need to do any setting up.

I bought one of these to bring with me when I travel – a lot of places I stay don't have CO detectors and I don't necessarily trust them to keep their appliances in good order. Looks nice, small and very lightweight, can easily stand up on your bedside table, seems to work. Haven't detected any CO yet, so can't promise anything there.Minus one star, however, because of a “feature” that prevents the battery compartment door from shutting unless you have a battery in it. I can understand why they added this, and for most people it's probably not even noticeable; it's probably a good idea for it to be annoying to not replace the battery if this is hung on the wall in your home. But given that there's no power switch (also expected and a good idea), it's obviously appropriate to take the battery out when I travel with it – the last thing I want is for my 90dB CO alarm to go off in my bag because the TEST button got depressed, and I'm not going to forget to put the battery in when I set it up. Having to carry the battery door separately from the rest of the alarm, or carefully press the tab down with a pencil to close it, is unnecessarily annoying.Not a dealbreaker – this alarm seemed the best in terms of size, weight, and general design for travel, and I'm not sure I'd pick a different one if I started over ­– but something to keep in mind.

Perfect for travel. Small, lightweight and easy to use. Feel safe using in a hotel, resort or AIR BnB.

Really like these. Easy app install. Have these in two different houses and can see them both in one app. Came with anchors and screws. Easy and simple product.

This replaced an older First Alert CO sensor which hit the 10-year limit (forced replacement). This one is much smaller than what we had. I did have to make some new screw holes since they did not align. The blue tint you see in the picture is a little light to help you see status when you push the test button. It is NOT on all the time. I like the fact that it shows and record the high PPM reading level.

Works great! Easy to read. Wonderful for hotel rooms that do not have a CO detector in the room.