... RoHS,SGS certificate 4)manual,wireless available Principle SHIDAI electric roller blinds system use 220V tubular motor (A built-in ... oxidation, anti-aging, corrosion preventive. According to the height of roller shutter, reelpipe diameter can be choosed 50mm, 70mm, 80mm or ... safety and reliability in installing and using. Electric shutter installs bearing can be realized in a motor drive a few fabrics ...