... certificate 4)manual,wireless available Principle SHIDAI electric roller blinds system use 220V tubular motor (A built- ... aging, corrosion preventive. According to the height of roller shutter, reelpipe diameter can be choosed 50mm, 70mm ... , 80mm or 110mm, underbeam made by white paint luxurious heavy rail, top-grade ... platform, multimedia central control system. blackout roller blinds