UID card block 0 (UID's block) can be modified arbitrarily.Block 0 directly with normal mif read-write device modification.Card of the default password for 12 F,FFFFFFFFFFFF.RFID smart nfc tags Repeated write 13.56MHZ IC keyfob can repeated UID changeable CARDS Block 0 Copy Clone 1K S50.Application: Applicable to , swimming pool, , tree, animal, entrance , bus, car park, identity certificate, attendance management, ticket, one-card payment, product identification, etc.Colour: whiteMaterial: ABSPackage Contents:10 * RFID NFC cardOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.