10pcs Rewritable Nfc Cards 1k S50 13.56mhz With Uid Changeable, Credit Card. Introducing the Zhizaibide UID Changeable Cards, Expertly Designed for Those Requiring Flexibility and Control in Their 1K S50 Standard IC Cards. This Set of 10 Cards Operates at a Frequency of 13.56Mhz, Crafted with Durable PVC Material, and Certified with CE for Quality Assurance. Key Features: - Customizable UID: Modify the Sector 0 Block Zero, Allowing You to Set Any UID You Desire. - High Rewrite Capacity: Each Card Supports Up to 100,000 Rewrites, Ensuring Long-term Usability. - Standard Dimensions: Credit Card Size of 86 * 54 * 0.84 Mm, Easily Fits in Wallets or Cardholders. - Compatible Protocol: Uses the 14443A Protocol, Ideal for Various Applications. - Secure Default: Comes with a Default Password of 12 F, FFFFFFFFFFFF for Enhanced Security. Note: These Cards Require Specific Equipment for UID Modification, Such As the ACR122u NFC Reader Writer, Proxmark3, or ICopy3. Typical RFID Reader Writers and NFC Phones Are Not Compatible for UID Alterations. Package Includes: - 10 UID Changeable Cards for 1K S50 Perfect for Professionals Needing Adaptable and Secure Card Solutions..