... a good RFID application.Contact smart card's chip can be seen on the card surface, the chip can be embeded into the plastic ... when it's inserted into the card reader, most hotel card choose this type.regular smart cards chip: NXP Mifare 1K S50, NXP ... Mifare 4K S70, Mifare Ultralight, Mifare Desfire, Infineon, TI, FM11RF08, EM4100/4102, TK4100, SLE4442/5542, FM4442 ...