Electric shutter, automatic open and close, low energy consumption, easy to use. Lighting, shading 0 degrees to 105 degrees can be debugged, can control the indoor lighting and shading. High galvanized sheet, with good anti-theft and impact resistance; oxidation and corrosion durability. Widely used: farms, greenhouses, factories, schools, villas, office buildings and stadiums, warehouses, workshops and other places.