The ZR4 system has a built-in high-definition LCD screen driver with dual 8-bit LVDS interfaces, which can support up to 1920*1080P60 frame LCD screen; it can be directly connected to a large-size high-definition digital LCD screen; it has been tested and passed the LCD screen size that can be connected There are 15.6”, 24”. ZR4 system supports physical button operation panel, which can be connected to KB1 module through FPC cable. KB1 module has 16-key mechanical elastic buttons, which are sensitive in operation and have excellent hand feeling, and can be directly used as physical buttons of the chassis.