The MIFARE Classic® 4K contactless smart card is connected to a coil with a few turns and then embedded into plastic to form the passive contactless smart card. 

The security layer sport the field proven CRYPTO1 stream cipher for secure date exchange of the MIFARE Classic® family. It is contactless transmission of data and energy and no battery is needed. 

Being developed based on expanding the functions of MIFARE Classic® 1K, the MIFARE Classic® 4K increases memory size significantly. Therefore, it is the perfect solution for multi-application cards and allows more flexible and convenient to users.