The basic parameters of SLE5542 chip card: The SLE4442 chip card is a 256-byte logical encryption card, with read data, write data, data protection and password operation functions, compatible with SLE5542/FM4442/ISSI4442! 256 bytes EEPROM organization! 32-bit protected memory composition method! 3-byte user password, the number of incorrect passwords: 3 times.! At least 100,000 erases and writes ! Temperature range: 0¡æ¡«70¡æ! At least 10 years of data retention! Working voltage: 5V! The password is 3 bytes, that is, 24 bits. Generally, the initial password is '255255255', converted into hexadecimal to 6F, that is,'FFFFFF'! Reset response complies with 7816-3 standardEach card coating a film, which is different from other smart cards in the market. The film is designed to protect your printer head.These cards are perfect for use as credit cards, gift cards & photo ID cards. They are especially beneficial to have in bulk for use in corporate & retail professionals