Abstract: A chip card comprising a memory chip and/or processor chip is characterized by the presence of a mirror memory to which any new internal stored data are transferred by an external read or write device whenever the memory chip and/or processor chip carry out an operation. The mirror memory thus has stored data corresponding to the stored contents in the memory chip and/or processor chip, and an LCD display or similar device with a voltage supply from at least one solar cell or the like. The mirror memory is lined to the LCD display or similar device with a voltage supply from at least one solar cell or the like. The mirror memory is linked to the LCD display in such a way that the data stored in said memory can be displayed by the LCD display.