The ST25TB04K of RFID cards are compatible with the ISO14443 standard, so support applications such as public transport and event ticketing, provide state-of-the-art RF performance and include a counter able to count more than 4 billion events. ISO14443-2 Type B with Proprietary Protocol 4K-bit EEPROM with write protect Two 32-bit counters with anti-tearing feature OTP bytes with conditional erased features