MIFARE DESFire EV2 2K/4K/ 8K card advantage: 

Highest security 

It could be a card, a keyfob, a wristband etc, applied for bank, payment system and high security level access control.

It is close to CPU card and have a very high security capability. 

High capacity can store more info. 

MIFARE DESFire EV2 2K/4K/ 8K Description:

  - Fully ISO / IEC 14443 A 1-4 compliant

 - 2k/4k/8 Kbytes EEPROM with fast programming

 - Secure, high speed command set

 - High data rates according to ISO / IEC 14443-4: 848 Kbit/s

 - Flexible file structure

 - Choice of open DES/3DES/3KDES/AES crypto algorithm in hardware

 - Anti-collision

 - Unique 7-byte serial number (ISO cascade level 2)

 - Data integrity: CRC and bit counting on physical layer

 - Available in MOA4 modules or 8” sawn bumped wafer

1)Material : silicone 

2)Size : 67mm / 61mm in diameter , 5mm in thickness

3)Color : purple,black, white ,blue, green, custom .

4)open-ended, wear as a beautiful watch . 

5)well protected against water, moisture , shock , high temperature .

6)Function : for access control / identification / goods checking / tracking 

7)Applied fields : widely applicable in quite humid environment like swimming pool,cold store,fieldwork,etc , and can work normally even covered in water or severe condition for a long time .