This is a MiFare Classic Coins cards- often used for electronic locks or customer identification. The tag contains a NXP S50 chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away.
- 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
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RFID/NFC Card Tag (MIFARE Classic 13.56MHz/1K S50)