The 4 inch TFT display is resistive touch screen TFT LCD, 4inch, 480*320 resolution; This 4 inch LCD screen with onboard stand-alone touch controller, better touching than solutions that use AD pins directly for touch control; The 4 inch touch screen monitor is PWM backlight control, allows to adjust the backlight to a comfortable level; The 4 inch resistive touchscreen controlled via SPI, only a few Ardui pins are used; Comes with STM32 and Ardui examples, convenient for porting, feel free to contact us for any technical support.