... Each key has a pilot light, when you:Press "Normal" key, the green pilot lamp is light; the door will be ... working status.Press "Lock" key, the red pilot lamp is light; the door will be on locking status.Press ... "Half-open" key, the red pilot lamp is light; the door will be open half.Press "Always ... -open" key, the red pilot lamp is light; the door will be always open. OUR ...