50pcs 13.56MHz Rewriteable 0 Block UID Tag RFID UID Keyfobs Rewrite Copier Writer Duplicator Copy IC Card

13.56MHz Writable Block 0 Used to Copy Cards

This card works the same as the normal IC cards, for 1K S50 standard. Only the Sector 0 Block Zero which is known as the Serial Number/Manufacturers Block(Chip UID) could be programmed to any UID you want.  

5 colors: red, yellow, black, gray, blue.
If you choose Mixed color, you will get: 10 blue, 10 gray, 10 black, 10 red, 10 yellow.