1. The card is fully compatible with 1k IC cards. 2. Block 0 of the card (the block where the UID is located) can be modified arbitrarily, and the modification can be repeated. 3. Block 0 can be modified directly with a regular IC reader and writer, no special equipment is needed. 4. The default password for the card is 12F, namely FFFFFFFFFFFF Parameter: Storage Capacity: 8Kbit, 16 partitions, two sets of passwords for each partition Working Frequency: 13.56MHZ Communication Speed: 106Kboud Read Range: 2.5-10CM Read and Write Times: 1-2MS Working Temperature: -20℃-85℃ Erase and Write Times: more than 100,000 times Data Retention: more than 10 years Production: 14443, 10536 Application Scope: prepaid meter, campus card, bus card, highway toll, parking, community management Color: mixed color Material: ABS Package Contents: 50 x UID Copy Cards Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the object in the picture to differ slightly from the real one. The allowed measurement error is +/- 1-3 cm.