These EM4200 proximity cards provide reliable identification and access control. Each card contains a unique serial number and operates with CMOS integrated circuit technology, designed to be compatible with EM4100/4102 and EM4005/4105 systems.

Specifications:
• Type: Read-only RF transponder
• Chip: EM4200 CMOS
• Memory: 128 bit
• Frequency Range: 100-150 KHz
• Reading Range: 2-10cm
• Protocol: ISO11784/785
• Performance:
  - Operating Temperature: -40°C to +85°C
  - Read/Write Cycles: 100,000
  - Data Retention: Up to 10 years