... keys, T9 input method, backup battery and has access control connectivity for Wigand-in, Wigand-out, Door lock connection, ... unlocking combination function, easy integration with door lock system. Versatile interface options including RS232/485, TCP/IP, USB Host, USB ... input, photo-ID, Web server, Camera, built-in battery Access Control Interface for: Lock, door sensor, exit button, alarm, Door Bell, ...