Contactless ISO CR-80 13.56MHz high security and HID Prox 125 KHz smart card, with two separate data areas for the access control: SIO™ and iCLASS™. Backwards compatibility with iCLASS™ systems guaranteed. iCLASS™ SE (SIO™) memory with 16 Kbits (2 KBytes), in 2 applications areas.