5pcs 13.56MHz RFID UID Tag Token Copy Keykobs Changeable Attendance Management Keychain For Clone 1k S50 Writable

Mixed color: "1 blue,1 red,1 yellow, 1 grey, 1 black". 

13.56MHz Writable mif 0 zero HF ISO14443A 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.