The HID 510x iCLASS Seos + Prox smart card combines dual frequency technology, allowing for seamless migration from 125 kHz proximity technology to the advanced, high - frequency Seos solution. This card supports both low - frequency proximity technology and the enhanced security features of the Seos application, making it an ideal choice for organizations looking to upgrade their access control systems while maximizing their existing investments. The credential is designed to securely authenticate identities, ensuring a robust security framework for various applications.