Opening limit of authority of the Mifare S50, ie, the UID of the Mifare S50 cards can be rewritten as your need. You can rewritten the UID of the card by my product "MF1-S50 Card Multi-function Quick Copier" very easily and quickly. 

Attention:
1.100% quality testing.
2.The types of packaging in the photo are in stock. Other type of packaging can be made in 10 days.

Tips:
After Mifare S50 card has been deciphered, the card copied by you could not be usable sometimes?
Because the password and data in the card are relative with the UID, the cards can not work as well. You would buy my "MF1-S50 Card Multi-function Quick Copier" and  "Mifare S50 of UID rewritten", so that you will get the same cards not only the password and data, but also the UID.