A parking number sign that combines design and functionality. It's not just about leaving phone numbers, but also knows how to protect privacy. Clear display when needed, one click hiding after parking, eliminating phone harassment, making the car look more simple and highend. Adopting a press type hidden structure. The number is clearly visible during temporary parking; The bottom is equipped with interior specific adhesive, which only requires one sticker for installation, does not peel off when exposed to sunlight, and leaves no residue when removed. The digital card adopts highdefinition night vision printing, which is clear during the day and easy to see at night