Stocked Facility Code & Number Range. The RF-programmable ProxCard ® II proximity access card is the industry choice for a cost-effective solution to proximity access control.  Features universal compatibility with all 125kHz HID proximity readers.  Provides durable packaging and consistent read range.  Provides an external number for easy identification and control. Supports Formats up to 85 bits, with over 137 billion codes. A PVC overlay allows for on-site photo ID using most direct image printers.