Passive display module for containers

A container such as travel luggage 1 that has an electronic E-paper display 3 that is powered only when the display needs to be changed by an external NFC tag reader/writer e.g. a smart phone. Data and power may be exchanged between the containers electronics and smart phone by modulated inductive coupling means 6. Alternatively power and data is transferred from an external device by capacitive means. Super-cap capacitors are used to store energy, and preferably provide sufficient energy to allow the container to programme a NFC tag. Preferably a smart phone app generates the information for the display, and preferably the container only emits radio signals when a smartphone is used next to the container. The container may contain a NFC tag reader and/or a dual frequency passive RFID tag 8; and a unique identification code allowing the luggage to be identified prior to being programmed. The luggage ID code may also be programmed into the RFID tag to aid identification of the luggage. In addition the container locking mechanisms 7 may have sensors that can be read by the external device, and an EEprom memory modified by internal sensors to record tampering of said locks.