This product is excellent and works very well. I bought additional sensors to better be able to control the temperature in my house. It was very easy to install with the information provided.
T9 Smart Thermostat. I have a few wireless thermostats over the years and this is by far the best one for my needs. No connection issues, multiple users for our family cabin. It's a great thermostat.
If you google T9 and Homekit integration, there appears to be a lot of promised that it'll come with an update, but it has not. That is the only thing this is missing!