DesFire 4K/8K is the contactless IC card which is made under NXP MF3 IC D41 or MF3 IC D81. Usually it is called DesFire4K/8K according to ISO14443A. The UID has four bytes. The storage capacity is 4K. The date can be protected by electronic key. We can offer PVC blank card, printing card, paper-sticker tag, Key chain, TOKEN and thin & thick cards of various specifications. The applications contain Door-control system, Checking-in system, Identification system, Physical distribution system, Automation system and various member-cards such as: meal-selling, subway, public transportation, club etc. And also it contains electronic consumption, electronic ticket, animal identification, target tracking, laundry management and various payment systems.