The HID 1336/1356 DuoProx II Clamshell Proximity Card is a dual-technology credential that integrates 125kHz 26-bit H10301 proximity functionality with a high-coercivity magnetic stripe. This combination allows organizations to support both proximity-based access control and legacy mag stripe applications using a single credential type. These cards are commonly deployed in enterprise, education, healthcare, and government environments where mixed access control systems are in use or where migration from mag stripe to proximity technology is still in progress. The durable clamshell construction is designed for long-term daily use in employee ID, visitor management, and facility access programs. When ordering 26-bit H10301 programmed credentials, organizations must provide a valid facility code along with the card numbering sequence to ensure compatibility with their existing access control system. Facility codes and serial ranges are typically sourced from existing credential inventories or previous order documentation. 125kHz proximity technology (26-bit H10301 format) Integrated high-coercivity (HiCo) magnetic stripe Facility code range: 0–255 Card number range: 0–65,535 Dual-technology credential (RF mag stripe) Comparable to Schlage 7510M1 credentials Comparable to Identiv 4030/4032 credentials Durable clamshell design for daily use
