13.56 MHz UID Writable Rewritable Clone IC Smart Key Card, Compatible with MIFARE Classic 1K, RFID Rewritable for Access Control Key Tag Rewritable -20 PCS

This card works the same as normal M1 cards. Works exactly like the MF S50, with 16 Sectors and 4 Blocks each Sector, but the Sector 0 Block Zero can be writable. It's advantage This is a perfect solution for a lost irreplaceable M1 Cards ID, you don't need to re-enroll new cards. Just program this new MF 1K's UID to the UID of lost card then you have a new Exactly the same card. User definable access conditions & password for each memory block Organized in 16 sector with 4 blocks of 16 bytes each (one block consists of 16 byte) Specifications Protocol: ISO14443A Capacity: 1k bytes EEPROM memory Rewrite Times: 100,000 times Read Distance: 0 ~ 10 cm(depends on the R/W device) Material: PVC Application Loyalty Ticketing Identification Access Control Package Include 20pcs X UID Rewritable Card

• Working frequency is 13.56MHz. Compatible with all kinds of door access control system.
• Support read, write and copy, over 100, 000 rewrite times.
• Each card with a unique encrypted ID number, can be reprogrammed.
• Fully compatible to MI-FARE Classic 1K,4-byte UID, 1K Byte memory, organized in 16 sectors of 4 blocks, compliant to ISO/IEC 14443A protocal.
• Suitable for 13.56MHz card reader and reading distance is 0-10cm (0-4inch).20pcs UID Rewritable Card