The xM1 is an ISO/IEC 14443-A Mifare® S50 1K RFID chipset encased in a 2x12mm cylindrical USP grade lead-free borosilicate biocompatible glass housing. The xM1 can be read and written to by many types of 13.56MHz RFID systems. While not truly an NFC compliant tag type, the xM1 does have limited NFC compatibility with certain NFC enabled Android devices such as the Samsung Nexus S, Samsung Galaxy Nexus, the Nexus 7, the HTC Amaze, etc. as well as Windows Phone powered devices such as the Nokia Lumia 920. It has 1KB memory and supports Crypto-1 encryption.
– 13.56MHz Mifare® Classic S50 2x12mm glass tag
– Memory size 1Kb with a max NDEF message size of 716 bytes
– Unlimited memory reads. Rated for 100,000 writes per memory block
– Encased in a 2mm by 12mm USP grade lead-free borosilicate biocompatible glass shell
– No Parylene C or porous polypropylene “anti-migration” coating means easy removal/replacement
– Sterilized in an autoclave, fully tested, and shipped in sealed sterilization pouch
Dangerous Things prefers our customers locate one of our professional body piercing or body modification partners to complete the installation of this product. If no partners are available in your area, you should be able to find a professional who is willing to assist you. We have written these documents to help introduce new professionals to the world of implantable transponders; Dangerous Things Professional Guides
WARNING: The xM1 is based on the Mifare® S50, which is one of the most popular RFID chips in the world. Unfortunately, the Mifare® S50 is not officially an NFC compliant tag conforming to NFC Forum tag types 1 through 4. However, many NFC enabled mobile devices that contain the NXP NFC reader IC, and some desktop NFC readers, will still read and write to the xM1. NFC enabled Android devices such as the Samsung Nexus S, Samsung Galaxy Nexus, the Nexus 7, the HTC Amaze, etc. as well as Windows Phone powered devices such as the Nokia Lumia 920 all have no problem reading/writing the xM1. Certain devices like the Google Nexus 4 phone and Nexus 10 tablet do not use the NXP NFC reader IC and can only read the xM1’s UID bits and cannot access any memory blocks for use with NFC. Check out the xNT for a fully NFC compliant glass tag option!
Passive RFID and NFC tags are magnetically coupled devices that pass power and data over a shared magnetic field. This means their effective read range depends on how well both of the antenna coils in the tag and reader couple with each other. This typically means the shape, size, and orientation of both antennas must be complimentary. Unfortunately, most reader devices, including mobile phones, typically have antennas designed with thin flexible PCB traces made into blocky rectangular shapes that lay along a flat plane. These antenna designs are great for coupling with and reading large flat label tags or card style tags and access cards, but they have a hard time coupling to the very small cylindrically shaped antenna coil inside our implantable tags. Most mobile phones and reader devices have a “sweet spot” that must be located and used each time to get consistent reads. Other devices, such as the Samsung Ezon digital deadbolt lock, tend to use wire wound coil antenna loops inside, which work much more reliably with small glass tags like our x-series tags. Please do not expect your mobile device to achieve the same read range with our x-series tags that you normally get with a label tag or card. For examples of this, please check out the following video posts; reading with USB device, and reading with a mobile device.
MF1ICS50 Functional Specification – The functional spec for the ISO/IEC 14443 Type A MIFARE® Classic S50 RFID tag.
NFC Type MIFARE Classic Tag Operation – How an NFC device (reader) can read and store NDEF data on the MIFARE® family of tags.
MIFARE Classic as NFC Type MIFARE Classic Tag – Extended functionality & info regarding NFC Type MIFARE® applications.
S50 Access Control – A paper written by Amal Graafstra that describes how security and access control works with the Mifare® S50 tag.
MIFARE® is a registered trademark of NXP corporation.
The xM1 is compatible with the following products: