Mifare Smart Card Plus (X) 4K 4bytes Compatible with MIFARE Classic brings increased security to end-user solution providers together with a seamless upgrade of existing infrastructure and services with low cost procedures. This new MIFARE product is supported by card and reader manufacturers and solution developers, and is the only MIFARE Classic-compatible mainstream smart card IC featuring pre-issuance of cards prior to infrastructure changes.

Key features
* 2 or 4 Kbytes EEPROM
* Simple fixed memory structure compatible with MIFARE Classic (MIFARE Mini, MIFARE 1k, MIFARE 4k)
* Memory structure as in MIFARE 4k (sectors, blocks)
* Unique serial number (4 or 7 byte)
* Multi-sector authentication
* Multi-block read * Anti-tear function for writing AES keys
* Keys can be stored as MIFARE Classic keys (2 x 48 bit per sector) or AES keys (2 x 128 bit per sector)
* Access conditions freely configurable
* Number of single write operations: 200, 000

Chip type：Mifare Plus (X) 4K
Size：85.5*54 or customer request
Tickness：0.86mm
Materials：PVC, PET...
Working Frequency：13.56KHz
Function：Write/Read