Keep access control simple at the edge while preserving flexibility behind the panel. HID Signo 40 is a wall-mount reader designed for organizations that need support for both legacy and modern credentials without changing the door experience. With 13.56 MHz and 125 kHz support, the reader fits environments where badge populations are still in transition. OSDP and Wiegand compatibility allows it to work in new builds and retrofit projects, while the terminal connection supports structured installation practices. Mobile-ready capability gives teams a path toward credential programs that reduce dependence on physical cards. This model is a strong fit for enterprise doors, tenant spaces, and controlled access points where a clean reader profile and broad credential support matter. For teams standardizing on HID Signo hardware, the 40 series offers a practical balance of compatibility, deployment flexibility, and long-term access strategy.