Ok, good stuff about T9 can be find on the manufacturer website. Set up was with some geek ups. Without phone app it is impossible to set proper time and proper time zone. Wifi: hard to connect, have to try and try with perfect signal. when connected time zone was off and no way to change it. Only after factory reset everything start to work normal, wheather forecast doesn't work from time to time and is not accurate.
T9 was easy to install and operate. It has the functionality to control my furnace and AC. I also like the remote sensor with motion sensing to set active rooms. I only wish the base unit had the motion tech to avoid having to install a remote sensor in the same space.
This thermostat is easy to control using the phone app. However, if there was someone in the house that does not have a smart phone and the app, they are unable to adjust temperatures using the wall unit.
quick and easy install .. great to be able to see the difference between the thermostat located in the dining room and a remote sensor installed in the bedroom .. even better to be able to prioritize the bedroom for a much more comfortable night's sleep .. also great to now have auto changeover between heat and cool and wifi access