PURPOSE: To provide the compact advertisement system for storefront sale promotion which can send video information as digital data to a reception side by radio with a very weak radio wave and display the video information for advertisement and explanation of an article at a store front.

CONSTITUTION: This system consists of an information supply device 1 which digitizes and compresses the video information including the explanation and advertisement of the article and sends it by radio and an information terminal device 2 which is arranged on a display shelf for the article or at the store front, expands the digital data sent by radio, performs D/A conversion, and restores and displays the original video information. The digital data can be sent from a relatively long distance by a general transmission system with the very weak radio wave through the compression processing.