Product review (4 stars): but it works great and was easy to install
Given the mixed reviews i was hesitant, but it works great and was easy to install, it just required some waiting, which the horrible directions don't tell you. Follow the instructions to set up the baee, put batteries in sensor, tturn swith on sensor to A then wait. It takes a while for the sensor to communicate. Only then can you add a device on the app to get everything running. It sure would he helpful if the told you this when you get the "non registered" message on the app. Once you are set up it may take hours for the units to communicate and give you a reading. Be patient.it does work. And there are no residential alternatives on the market.