Abstract: Place active and dynamic electronic displays in front of shopping carts to attract customer attention. Content of these active displays can be changed quickly and easily. Information from central or local computer is transmitted through base stations to the display units using wireless technology. The computer uses an integrated software solution to manage and support signage management. The electronic displays have unique addresses therefore the system allows for transmission of information to single display units or groups of units. Display units may also store a set of pre-transmitted messages. Battery and power generator coupled to cart's wheel provide power to display units, eliminating need of battery replacement.