Contactless ISO CR-80 13.56 MHz (read/write) smart card, LEGIC™ PRIME MIM 1024. Memory assignable by user: 944 bytes (Dynamic segmentation, with up to 59 segments, with up to 8Kbytes each one ). DES, 3DES and LEGIC™ propietary (with 64 bits keys) cryptography. Made of PVC.