We support OEM, if more than 500pcs, we can print your logo in card freely.

Note:  need use my spcial software with acr122u reader

1pcs 13.56MHZ UID MF 1K S50 0 block 7 bytes changeable Rewritable card 

This card works the same as the normal IC cards, for Mf 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.  

The product is as follows:

1,UID card block 0 (UID's block) can be modified arbitrarily.