Cool, three-dimensional, holographic, enhance attention, enhance visual impact. WIFI transfers content, which can be remotely manipulated to replace content and upgrade. Clear image, easy to replace advertising content, support common images, animation, image display. It is suitable for cinemas, airports, shopping malls, subway, city advertisements, exhibitions and other places. Vivid holographic display of goods, dynamic display of product details easy to identify, applicable to the information prompt and application of goods.