Secure constrained entry points without compromising credential strategy. The HID Global SIGNO20 brings SEOS profile support, OSDP or Wiegand connectivity, and mobile-ready access to a compact mullion form factor designed for narrow door frames and tight mounting locations. Built for environments that need more than a basic proximity reader, this model supports modern credential migration while preserving compatibility with existing controller infrastructure. The pigtail connection simplifies field termination, and the reader’s compact footprint makes it a practical fit for retrofits, side doors, and entrances where wall space is limited. For teams standardizing on stronger authentication at the edge, the SIGNO20 helps reduce replacement friction. It gives security architects a path to adopt mobile credentials and SEOS-based deployments without forcing a full rip-and-replace of the access control stack. That makes it a strong choice for organizations that value controlled rollout, cleaner integration, and long-term credential flexibility.