DoorBird IP I/O Door ControllerTamperproof control of up to three doors or gates Encryption based on banking standards Monitoring of two external sensors Three freely configurable, bi stable switching relays (permanently open, permanently closed, toggle) The switching relays keep their state even in the case of loss of power Let DoorBird do More! All signals between the door station and the DoorBird I O Door Controller are transmitted tamperproof and encrypted according to banking