The fact that it is also a thermometer is great too

I like their small size and the fact that it tracks the temperature in the area they are placed

The fact they work with SmartThings is great as well.- Open/Close distance is very practical

Will be replacing my older no-name sensors as they die.

The manufacturer states that battery life can be up to three years and, if that's the case, I'm not worried as I replace batteries once a year on HA, smoke, fire, and CO2 detectors