1. The card is fully compatible with for IC 1k card. 2. The block0 of the card (the block where the UID is located) can be modified arbitrarily, and the modification can be repeated. 3. Block0 can be modified directly with for IC reader and writer, no equipment is needed. 4. The default password of the card is 12 F, namely FFFFFFFFFFFF parameter: Storage capacity: 8Kbit, 16 , 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 preservation: more than 10 years Production standard: ISO 14443, ISO 10536 Application : Water meter prepaid, campus card, bus stored-value card, highway toll, parking lot, community management Colour: mixed color Material: ABS Package Contents: 50 x UID copy card Only the above package content, other are not included. Note: Light reflection 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.