Model Number : 31. The card is fully compatible with mi-fare 1k card;2. The block0 of the card (the block where the UID is located) can be modified arbitrarily and modified repeatedly;3. The default password of the card is 12 F, namely FFFFFFFFFFFF.Storage capacity: 8Kbit, 16 partitions, two sets of passwords for each partitionWorking frequency: 13.56MHZCommunication speed: 106KboudReading distance: 2.5-10CMLabel size: 9mm in diameterReading and writing time: 1-2MSWorking temperature: -20℃-85℃Erase and write times: >100000 timesData preservation: >10 yearsPackaging materials: coils, chipsProduction standard: ISO 14443, ISO13.56mhzApplication scope: water meter prepayment, campus card, bus stored-value card, highway toll collection, parking lot, community management.