Red access control readers are available with low-frequency proximity credentials at 125 kHz, high-frequency credentials at 13.56 MHz, and mobile credentials using Bluetooth Low Energy (BLE), depending on the reader configuration. Select models also combine multiple credential technologies or add keypad entry, helping installers support existing credentials while planning a transition to newer options.

Mullion red access control readers use a narrow form factor suited to door frames and other space-limited mounting locations, while single-gang readers fit standard single-gang electrical boxes or compatible back boxes. Both form factors may support secure OSDP communication, proximity credentials, mobile credentials, or keypad entry, depending on the model and installation requirements.

Choose a red access control reader with a keypad when a project needs PIN entry alongside credentials such as proximity cards, high-security cards, or mobile devices. Keypad readers support layered access options for applications that benefit from code-based entry, while single-gang and mullion form factors help accommodate different door and mounting conditions.

Open Supervised Device Protocol (OSDP) provides secure communication between red access control readers and compatible access control systems. Its multi-drop capability can connect multiple readers along one cable, which helps simplify wiring and support system expansion.