10pcs Nfc 1k S50 13.56mhz Rewritable Key Cards With Uid Modification. Introducing Our Versatile NFC CUID Key Stickers, Perfect for Tech Enthusiasts and Professionals Looking to Enhance Their Smart Security Systems. These CUID Android App MCT Modify UID Changeable NFC 1k S50 Stickers Operate at 13.56MHz, Offering Seamless Integration with Compatible Devices. Uniquely Designed, They Allow You to Modify the UID of Each Card, Specifically at the Sector 0 Block Zero. This Offers Flexibility for Applications Requiring Customized UID Numbers. Key - Frequency: 13.56 MHz - Chip Type: CUID - Mode: Read and Write - Dimension: Diameter 21.6mm, Thickness 0.8mm - Read and Write Distance: 1-10cm - Rewritable Capability: Over 100,000 Times - Data Retention: More Than 10 Years Package Includes: - 10 Pieces of CUID Card Stickers Experience a New Level of Customization with These Writable and Durable NFC Stickers, Designed for Easy UID Modifications Using Android's MCT App. Suitable for Use with a Range of Devices Including ACR122u NFC Reader Writer, Proxmark3, and Others. Elevate Your NFC Projects with This Reliable and Adaptable Technology..