A memory card (103) for use in an electronic apparatus (101) is proposed. In order to control an electronic apparatus (101) with an inbuilt processor (301) incapable of exporting digital data externally of the electronic apparatus (101), a user local at the electronic apparatus (101) is required to operate the electronic apparatus (101). This is not always convenient. The proposed memory card (103) has a wireless module (207) for receiving an instruction wirelessly from a remote wireless-enabled apparatus (105), and also a central processor (201) for controlling the inbuilt processor (301) of the electronic apparatus (101) in accordance with the received instruction.