CUID Gen2 electronic tag rewritable smart key NFC clone token ISO14443 NFC changeable sticker IC 13.56Mhz RFID replica badge

Specification:
1. CUID card block 0 (UID block) can be modified arbitrarily.
2. Block 0 can be modified directly with an ordinary IC reader/writer.
3. The default password of the card is 12F, FFFFFFFFFFFF.
4. Supports NFC modification of UID on Android phones, but does not support iPhone (but NFC on mobile phones is relatively unstable, we usually recommend using an RFID reader for reading and writing!)
5. Please confirm that your device supports writing to CUID card.
6. Due to different batches, the coils inside the wafer may be slightly different, but it is normal for the functions to be consistent (usually round)

Frequency: 13.56 MHz
Protocol: ISO14443A
Capacity: 1k bytes EEPROM memory
Number of rewrites: 100,000 times
Modulation method: ASK Manchester encoding
Reading distance: 0 ~ 7 cm (depends on the card reader)
Material: PVC
Size: 25MM round

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CUID white card: https://www.aliexpress.com/item/1005006112801161.html
CUID tag:https://www.aliexpress.com/item/1005006302595760.html
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