Set at the intersection of the parking lot, it is used to identify whether there are empty parking spaces in each area. If there are empty parking spaces, the indicator arrow is on and the number of remaining parking spaces is displayed. If there are no empty parking spaces, the arrow is off. The display screen is composed of high-brightness LED module, drive circuit, control circuit, bracket and other parts. It receives the output information of the central controller, displays the position of the parking space in the form of numbers, arrows and text, and guides the driver to quickly find the empty parking space allocated by the system.