| 摘要 |
PROBLEM TO BE SOLVED: To reduce the installed number of electronic shelf tag devices.SOLUTION: A server device 10 transmits commodity information related to commodities a1 and a2, and positional relation information indicating positional relation between an electronic shelf tag device 30A and the commodities a1 and a2 to the electronic shelf tag device 30A. The electronic shelf tag device 30A receives the commodity information and the positional relation information of the commodities a1 and a2 from the server device 10, changes over between the commodity information and the positional relation information of the commodity a1, and the commodity information and the positional relation information of the commodity a2 for each prescribed display time according to the received commodity information and the received positional relation information, and displays them. |
