221123NG-CZ: Offline unit for escape routes:

Offline unit with battery, push button and buzzer assambled in white plastic housing. The push button allows to known the loking/ unlocking state, this device is inside a green plastic housing and is resettable with an special key.
For unlock the emergency door the user must be press in the central part of the upper window of the push button. When somebody press the push button, the bottom window change the message, it show us that the state of the door has changed to unlock and the buzzer sounds, signal that the door is unlocked. To resettable the push button the rsecurity officer must be introduce the special keys in the holes situated in a bottom part of the push button and makes a vertical pressure.