Card of the default password for 12 F,FFFFFFFFFFFF. UID card block 0 (UID's block) can be modified arbitrarily. Block 0 directly with normal mif read-write device modification. RFID smart nfc tags Repeated write 13.56MHZ IC keyfob can repeated UID changeable CARDS Block 0 sector zero Copy Clone 1K S50. Application: Applicable to sauna, swimming pool, patrol, tree, animal, entrance guard, bus, car park, identity certificate, attendance management, ticket, one-card payment, product identification, etc., Weight: 0.3968320716 pounds, Manufacturer: Yoeruers