Dual Format T5577 & UID Changeable Key Fobs Compatible with T5577 & MF Classic 1K 13.56Mhz
Dual Format. Two Chips & Antennas inside each card.
Use ProxMark3 (Magic Chinese Guy function) or libnfc to change UID.
Uses “backdoor” technique to change/rewrite UID.
UID can be changed multiple times.
Improved High Stability Key Fobs
Please note: Weak and poorly constructed antennas can cause the card to permanently lock. Please make sure antenna is well tested and all surrounding EMI sources are turned off. If you are using a cellphone NFC chip please make sure that your cellular, WiFi & Bluetooth functions are all turned off before communicating with card. The card is tested and pre-programmed with a custom UID. If this card cannot revert back to the pre-programmed UID it is considered locked and not returnable. We do not provide technical support for this product.