This is a blank MiFare Classic 1K sticker - often used for laundry or identification but also found in other systems where a small proximity card is desired. This one is clear! The tag 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 PN522 NFC/RFID breakout board and NFC/RFID Shield for Raspberry Pi!
These chips can be written to amp; store up to 1 KB of data in writable EEPROM divided into banks, and can handle over 100,000 re-writ's. You can use our PN532 NFC/RFID breakout board or NFC/RFID Shield for Raspberry Pithe 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
- 25.4mm diameter x 1mm / 1" diameter x 0.03"
- 0.9 grams / 0.03 oz
- Works about 2" away from reader
Downloads: NXP S50 datasheet