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This is a doorknob which lights in a time of disaster.
This helps you in an emergency.
We do hope that this is to be installed in public
facilities like a hotel and a city hall . This works as
an emergency tool as well as a flashlight.The light
of this doorknob shows you where the nearest
emergency exit is. Besides, another light on the
outside leads you to a safe place promptly. Usually
you can see the room's situation through the each
color of the light on the outside.
This is an outstanding tool : compact design.
Needless to say, it must save our lives in an emergency.