This product works exactly as described. It communicated with my home WiFi right away and the app that I’m using on my iPhone allows me to save money by turning down the heat or A/C when I’m not home. If you have 4 wires coming in to your existing thermostat, you will have to get into your furnace to install the adaptor and purchase a small length of 18/5 cable to connect the adapter which is supplied with your T6 thermostat to your furnace wiring. This was a bit tricky as you have to ensure that you get the colours correct, but once it was done, it worked right away.