10Pcs 13.56MHZ CUID Keyfobs CUID Changeable MF S50 1K IC Keys Keyfobs Token Tags NFC Clone Copy Bloc

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 CUID) could be programmed to any UID you want.CUID card block 0 (UID's block) can be modified arbitrarily.block 0 directly with normal mif read-write device modification.Frequency: 13.56 MHzCapacity: 1k bytes EEPROM memoryRewrite Times: 100,000 timesRead Distance: 0 ~ 10 cm(depends on the Reader)Initial Key: FFFFFFFFFFFF (12F)common 13.56 mhz rfid reader writer and nfc phone can not write the particular cards!Colour:random color , don't accept the specified colorMaterial:ABSPackage Contents:10 x CUID TagsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.