50pcs 13.56mhz UID key

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

Please note that this is UID chip which is not NFC chip, please don't use with NFC app on phone to write the card, it won't work.

Specification:
1,UID card block 0 (UID's block) can be modified arbitrarily.
2,block 0 directly with normal mif read-write device modification.
3,card of the default password for 12 F,FFFFFFFFFFFF.

Features
1.User definable access conditions & password for each memory block
2.Organized in 16 sector with 4 blocks of 16 bytes each (one block consists of 16 byte)
3.Each block is rewritable and useful