The range seems to be really good and can be installed at funny angle due to door molding shape and still make contact to show door actions.

works great easy install

For the price and the for the positives I have learned to live with the.

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