1. The card is fully compatible with IC 1k cards. 2. Block0 on the card (the block where the UID is located) can be changed arbitrarily, and the change can be repeated. 3. Block0 can be changed directly with a regular IC reader and writer, no special equipment is needed. 4. The default password of the card is 12 F, namely FFFFFFFFFFFF Parameter: Storage capacity: 8Kbit, 16 partitions, two sets of passwords for each partition Working frequency: 13.56MHZ Communication speed: 106Kboud Reading distance: 2.5-10CM Reading and writing time: 1-2MS Working temperature: -20-85 Erase and write: more than 100000 Data retention: more than 10 years Production standard: ISO 14443, ISO 10536 Application area: Water meter prepaid, campus card, bus stored value card, highway toll, parking lot, community management Color: color Material: ABS Package content: 50 x UID copying cards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.