100PCS 125Khz RFID Tag Coin EM4100 Card Keyfobs Token 20MM 25MM 30MM with Access Control Tracking Car

1. Chip Compatibility

   • Utilizes TK4100 chip, fully compatible with EM4100 protocol. Both operate at 125kHz low-frequency (LF) and support 64-bit read-only data storage without write capability.
   • Compatibility advantage: Works seamlessly with existing EM4100 systems, eliminating the need for reader upgrades

2. Physical Characteristics

   • Size: Available in 18mm/25mm diameters (coin-shaped) or customizable formats (e.g., keyfobs, wristbands).
   • Material: PVC, ABS, or epoxy resin encapsulation ensures waterproof, shockproof, and dustproof performance.
   • Durability: >100,000 read/write cycles, data retention >10 years, operational in extreme temperatures (-40°C to 85°C).

3. Performance Metrics

   • Frequency: 125kHz LF, ideal for environments with metal/water interference due to strong penetration
   • Read Range: 2.5–10cm (varies with reader power and environmental factors)
   • Speed: 106KBaud communication rate, 1–2ms response time for rapid identification.

Application Scenarios

• Access Control: Employee authentication in offices, residential complexes, and industrial facilities.
• Asset Tracking: Inventory management, logistics, vehicle identification, and equipment tagging
• Payment & Ticketing: Prepaid systems, parking fees, and event access.
• Industrial Use: Withstands harsh conditions (e.g., high temperatures, vibrations) for factory equipment tracking.

Comparison with Similar Products

• vs. High-Frequency IC Cards (e.g., M1):
  • HF cards (13.56MHz) support read/write and encryption for secure transactions, while TK4100/EM4100 are cost-effective for fixed-ID applications.
• vs. T5577 Programmable Tags:
  • T5577 supports multiple protocols and data rewriting, whereas TK4100 offers higher stability with factory-locked IDs but lower security.