iCLASS® Prox Proximity Smart Card combines iCLASS smart card technology and HID 125 kHz Proximity technology in a single ISO standard thickness smart card. This enables contactless smart card applications to be added to existing HID Prox access control systems. iCLASS smart card technology was specifically designed to make access control more powerful, more versatile, and ensures high security access control with mutual authentication between smart card and reader. iCLASS 13.56 MHz read/write contactless smart card technology provides versatile interoperability in applications such as access control, network log-on security, cashless vending, time and attendance, event management and biometric identification.