A very useful tool which shows all the required information for identifying the correct firmware in case of something went wrong with the OS. So, keep in mind to place the screenshot of it somewhere safe. The app shows the detail of your display panel id, rom version, platform id...... All this is data is required before flashing a new rom as MiTv has so many many variant like MiTv 4a 49" has more than 4 variant, like wise for MiTv 4 55". So, on every model has some different variance, all because of having different display panels and for other reasons. Some display panel will be from LG or Samsung and two other brand from Chinese manufacturer.