The xDF2 NFC chip implant is an ISO14443A NFC Type 4 compliant transponder. It works with NFC enabled smartphones, certain commercial access control systems, various ISO14443A compatible door locks, as well as USB contactless ISO14443A readers.

The DESFire EV2 is a very powerful chip, capable of doing much more than simply holding NDEF record data for simple NFC applications. The true utility of this chip is best utilized by programmers and engineers, but there’s also nothing wrong with storing a lot of NDEF data on it either.

The xDF2 has enough space you could store a vCard digital business card complete with all your contact information and even a small photo of yourself on this chip with space to spare!

NFC compatible Android apps can be found in the Google Play store here.


If you are looking for higher read range of the same chip spec it’s here.



  • 13.56MHz ISO14443A & NFC Type 4 DESFire EV2 RFID chipset
  • Full datasheet for the NXP DESFire EV2 RFID/NFC chip
  • 7 byte UID and 8K bytes of user read/write memory
  • 25 year data retention. Rated for 500k writes per memory block.
  • Encased in 3mm by 13mm bioglass with non-toxic epoxy
  • Pre-tested and pre-loaded into sterile injection assembly
  • No “anti-migration” coating means easy removal/replacement

DESFire EV2 Specs

  • Common Criteria certification: EAL5+ (Hardware and Software)
  • Optional RANDOM UID for enhance security and privacy
  • Mutual three pass authentication
  • Mutual authentication according to ISO/IEC 7816-4
  • Flexible keys: 1 card master key and up to 14 keys per application
  • Hardware DES using 56/112/168 bit keys featuring key version
  • Hardware AES using 128-bit keys featuring key version
  • Data authenticity by 8 byte CMAC
  • Data encryption on RF-channel
  • Authentication on application level
  • Hardware exception sensors
  • Self-securing file system
  • Backward compatibility to MF3ICD40: 4 byte MAC, CRC 1



The microchip implant insertion takes less than 10 seconds via a needle syringe delivery system.

The insertion hole is normally fully closed 2-3 days later and the swelling will dissipate over 2 weeks.
The insertion scar is usually completely invisible by 2 months.