The dormakaba 12690-DS4-BK key fob is a high-security 13.56MHz credential designed for modern access control systems utilizing advanced smart card technology. Built on MIFARE® DESFire® EV3 4K, this fob delivers encrypted communication, mutual authentication, and multi-application capability for enhanced security and performance. Commonly used with dormakaba RFID platforms—including Saflok, Ilco, and electronic lock systems—as well as compatible smart card readers, the 12690-DS4-BK is ideal for hospitality, multifamily, and commercial environments transitioning away from legacy proximity systems. With no 125kHz component, this DESFire-only credential is purpose-built for secure, future-ready deployments where data protection and system scalability are critical. Durable and compact, it provides reliable operation in high-traffic environments while supporting advanced credential management and encoding options.