MiFare Classic (13.56MHz RFID / NFC) Bracelet - 1KB

Description

This is a blank MiFare Classic silicone bracelet - often used for parties / events or identification but also found in other systems where a small proximity card is desired. The bracelet contains a NXP S50 chip and an antenna, and is passively powered by the reader / writer when placed a couple inches away

These can be read by almost any 13.56MHz RFID / NFC reader but make sure it can handle MiFare cards as there are a few other encoding standards (like FeLica) They are tested and work great with both our PN532 NFC / RFID breakout board and Adafruit NFC / RFID Shield for Arduino!

These chips can be written to & store up to 1 KB of data in writable EEPROM divided into banks, and can handle over 100,000 re-writes. You can use our PN532 NFC / RFID breakout board or Adafruit NFC / RFID Shield for Arduino to read and write data to the EEPROM inside the tag. There is also a permanent 4-byte ID burned into the chip that you can use to identify one tag from another - the ID number cannot be changed.

These use the S50 chipset, which used to be the 'classic' NFC chipset. In ~ 2014, the NFC forum decided not to support this chipset anymore, so newer phones do not support the MiFare classic. This only matters if you're trying to use this tag with a phone / tablet.

S50 chip specification:

1 KiloByte (8 KiloBit) non-volatile EEPROM storage
Built in encryption engine with 48-bit key
4 Byte unique identifier burned into the chip
13.56 MHz frequency

Bracelet specification:

Fits wrists / ankles / hands up to 70mm (2.75 ″) diameter 25.4mm diameter
Bracelet made of rugged waterproof silicone
0.9 grams / 0.03 oz
Works about 1 ″ away from reader
Weight: 14.86g

NXP S50 datasheet

 
TECHNICAL INFO:
Producer's page
NXP S50 Datasheet

Product information