What is "Window rolling shutters"?

Rolling shutters are the type of blinds executed in the form of a roll in which two guides of a plate and going on them. The essence of the mechanism of opening is reduced to turning of a strong metalplastic rolling shutter in a door/window opening in a roll for couple of seconds and without special physical efforts of the user.
Are established in window or doorways, in order to avoid influence of adverse climatic conditions, shumo-, a heat - sound insulation and protection against penetration.