uid writable Tag 13.56mhz Block 0 Changeable Keyfob (Pack of 5) (Blue)

• 1. Frequency: 13.56 MHz (high frequency, compliant with ISO/IEC 14443 standard). ‌
• 2. Storage structure: Compatible with the 64 block storage structure of M1 1K card (16 sectors x 4 blocks/sector), where the 0th sector block 0 (UID block) can be repeatedly modified. ‌
• 3‌. Reading and writing methods: Passive design, non-contact RF induction, supporting reading and writing operations through NFC or dedicated card readers. ‌
• 4. Application scenarios: Widely used in access control systems, one card systems (such as consumption and attendance), parking lot management, and identity verification scenarios. ‌
• 5. The keychain design is compact and easy to carry

The product is equipped with a built-in UID chip, which is a special non-contact IC wristband with modifiable function. It allows users to freely erase and write data from any sector, especially the 0th sector block 0 of the storage card's unique identifier (UID), thereby achieving card copying or simulation function. ‌