1.hf 13.56mhz rfid round nfc tags 2.flip-chip technique 3.iso 14443a type hf 13.56mhz rfid round nfc tags Specification:Chip optionNXP Mifare 1K,Defire serial,Ultralight chip,Ultraligt-C,NXP NTAG203,etcProtocolISO 14443 type aFrequency13.56MhzReading range2-3 cm (depends on the power of reader )End product sizediameter 30 mm Applicationmobile phone payment system,electronic tickets,mobile phone ...