Content in MFRC-522 RFID NFC Reader with card and tag

Is that OK to rewrite the data on the NFC Card from MFRC-522 RFID NFC Reader ?
No. It's for ADVANCED user Only! But if you trying to change the data on the tag/card (At your own
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What is the Operating Frequency and Operating voltage of MFRC-522 RFID NFC Reader?
The Operating frequency is 13.56 MHZ and it's 3.3V Input supply.
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What is the Data Interface of MFRC-522 RFID NFC Reader?
It's SPI Communication
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MFRC-522 RFID NFC Reader with card and tag

Based on RF module RC522 Near Field Communication module, with operating frequency og 13.56mHz where you can read and write a tag. Compatible with all gizDuino / Arduino microcontroller boards.