This is a blank 13.56MHz RFID/NFC silicone bracelet. It has a small RFID chip and an antenna, and gets power passively from the reader/writer when it's just a few inches away. Almost any 13.56MHz RFID/NFC reader can read it, but make sure it supports ISO/IEC 14443 Type A cards as there are other encoding standards. It works great with our PN532 NFC/RFID breakout board and Adafruit NFC/RFID Shield for Arduino! These chips can store up to 1 KB of data in writable EEPROM divided into banks, and can handle over 100,000 re - writes. You can use the mentioned boards to read and write data to the tag's EEPROM. There's also a permanent 4 - byte ID on the chip for tag identification. It uses an ISO/IEC 14443 Type A chipset. Since around 2014, the NFC forum stopped supporting it, so newer phones may not work with it. This only matters if you want to use the tag with a phone or tablet.
Using this 13.56MHz RFID/NFC silicone bracelet is easy. First, get a compatible 13.56MHz RFID/NFC reader that supports ISO/IEC 14443 Type A cards. You can use our PN532 NFC/RFID breakout board or Adafruit NFC/RFID Shield for Arduino. Place the bracelet a few inches away from the reader to power it up and start reading or writing data. To write data, just use the compatible board to input the information you want to store in the 1KB EEPROM. You can rewrite the data over 100,000 times. Remember, there's a fixed 4 - byte ID on the chip that can't be changed, which you can use to tell one bracelet from another. Note that newer phones may not support this bracelet because the chipset it uses is no longer supported by the NFC forum since around 2014. For maintenance, keep the bracelet away from extreme heat, moisture, and strong magnetic fields to ensure its normal operation.
