mifare crystal tag is a fashion tag made by HUAYUAN which derives its name from its unique appearance. The sparkling and colorful epoxy material could be mold into all kinds of shape, then hanging on the mobile phone, bag as a decoration or stick on the wall and screen. Due to the small and lovely shape, this kind of tags have been produced using highly sophisticated processes such as identification, royalty, promotion, electronic ticket and even payment for NFC system. The chip encompasses all areas of radio frequency identification, not only in terms of frequencies 125/134.2 kHz, 13.56 MHz but also UHF. It is particularly useful for the change-over of applications with different technology as well as for multi RFID choice. For this reason, we are willing to select the most suitable design for specific customer requirement.