The blinds can be crankd by a controled, cord or by a 230V/50Hz electromotor. The motor solution has the advantage in the possibility of connection to the central electronic handling system. If not designed otherwise, the blinds are usually fitted with metalic cover plate that visually hides bundles of pulled-out blinds.
They are used for shading windows of modern detached houses. It is also a suitable solution for shading band windows in administartive and commercial buildings.