Used to test the characteristics of mobile phone tablet touch screen Screen information: screen available area resolution size, pixel, density, DPI value and so on. Screen color test: detect the screen color rendering force, dead pixels, bright spot can be found at a glance. Screen Gray Scale Test: The more grayscale you can see, the better the screen color shades. Multi-touch test: detect multi-touch touch screen touch points. The screen can touch the area test: the full range of detection scr