rRfid Classic 1k MI Card NFC Tag Sticker Programmable NFC Label for Mobile Payment Access Control RFID 13.56mhz ISO14443A Card（Sector 0 Locked） (200)

The M1 card is a widely used contactless smart card that complies with the ISO/IEC 14443A standard. Operating at a frequency of 13.56MHz, it has a typical read-write distance ranging from 2.5 to 10 centimeters. Due to its high reliability and ease of operation, the card is extensively applied in systems such as access control, public transportation, campus smart cards, electronic wallets, and identity verification.

• 1. Operating frequency: 13.56mhz, following the IS014443A protocol
• 2. 1024 bytes of storage space on M1 card. Divided into 16 sectors, each sector contains 4 data blocks (a total of 64 blocks), with each block being 16 bytes in size. Among them, the third block (Block 3) of each sector is the sector tail block, used to store key A, key B, and access control bits. The unique UID number of the storage card in Block 0 of sector 0 is fixed at the factory and usually cannot be modified.
• 3. Size: The standard card size is 85.5 × 54 × 0.84mm (ISO standard size), and customized sizes such as keychains and dropper cards are also supported.
• 4. Read write distance: generally 1.5-10cm, erase life:>100000 times, data retention period>10 years.
• 5. Attention: It needs to be used with a compatible 13.56mhz card reader
• 6. Applications: access control, public transportation, campus one card and other scenarios