The Paxton 692-052 Net2 proximity ISO cards are designed for use with Paxton Net2 systems. These cards are blank and white, and come programmed with an eight-digit unique number for easy tracking and issuance. The 125kHz frequency of these cards makes them ideal for creating a secure access control system.Pack of 500125kHz frequencyCR80 credit-card size (86mm x 54mm)Manufacturer part number: 692-052