The TK4100 125kHz LF RFID Access Card is a standard CR80-format contactless identification card designed for access control, staff identification, attendance systems, membership applications, and other short-range low-frequency RFID projects. Its standard 85.6 × 54mm PVC card format supports full-surface printing and personalization while remaining compatible with common card holders, badge accessories, and access-control workflows.
Operating at 125kHz LF, the card uses a TK4100 read-only RFID chip compatible with EM4100/EM4200-type applications according to the selected reader system. It provides a factory-programmed 64-bit unique ID for identification and does not provide rewritable user memory. The credential is therefore typically associated with user information, access permissions, attendance records, or membership data in the reader or backend management system.
Typical reading distance is approximately 2 to 10cm, depending on the reader antenna, reader output, card orientation, and surrounding environment. The laminated PVC construction supports everyday access-control use and can be customized with CMYK offset printing, inkjet ID numbering, laser engraving, HiCo or LoCo magnetic stripes, punched slots, and signature panels.
