100Pack 13.56MHz Rewritable Key Fobs Compatible with 1K Programmable Access Control Tags

13.56 MHz Rewritable RFID Keyfobs 100 Pack Secure, programmable keyfobs designed for access control, attendance, membership, and asset identification systems that use MIFARE Classic 1K technology. Key benefits Ready for bulk deployment: 100 rewritable keyfobs included, ideal for offices, gyms, schools, and multiuser facilities. Programmable and reusable: Each fob supports writable 4byte UID configuration so you can program or reprogram identifiers as system needs change. Secure unique identifiers: Each tag contains a unique encrypted ID number for reliable identification and reduced risk of duplicate IDs. Works with existing systems: Compatible with MIFARE Classic 1K readers and controllers that support writable 4byte UIDs, minimizing replacement costs. Compact and practical: Keyfob form factor fits on keyrings for convenient everyday use by staff, members, and visitors. Specifications and functions Frequency: 13.56 MHz, suitable for standard HF RFID systems. UID format: 4byte writable unique ID, encrypted for secure identification. Type: Rewritable smart keyfob for access control and identification applications. Quantity: Pack of 100 identical fobs ready for programming. Form: Keyfob design for easy carrying and attachment to keys or lanyards. Primary use: Read and write operations for access control, time tracking, and membership systems using MIFARE Classic 1K compatibility. What makes these fobs stand out Rewritability: Unlike fixedID tags, these fobs can be reprogrammed, allowing reuse for staff turnover or system changes. Unique encrypted IDs: Each unit provides a distinct encrypted identifier to help maintain reliable user mapping and prevent ID collisions. Bulk packaging: The 100piece pack streamlines provisioning when onboarding multiple users or replacing lost fobs. Practical use scenarios Office access control: Distribute programmable keyfobs to employees for door entry systems that use MIFARE Classic 1K readers. Reassign fobs quickly when roles change or when fobs are lost. Gym or club membership: Issue fobs to members for facility access and checkin. Reprogram fobs for membership renewals or members without buying hardware. Time and attendance or library systems: Use fobs as individual identifiers for clocking in and out or checking out items. Centralized programming lets administrators manage IDs efficiently. What you get and deployment notes One package containing 100 rewritable 13.56 MHz keyfobs with 4byte writable UIDs and unique encrypted ID numbers. Compatible with systems that support MIFARE Classic 1K and writable 4byte UID tags. Confirm reader and controller compatibility before deployment to ensure writable UID support. These keyfobs provide a practical, reusable identification solution for facilities requiring programmable RFID credentials in a convenient keyfob form factor.