1.Blackout fabric,Motor drive, stop glare 2.Aluminum Alloy bar weighted on bottom 3.elegant, beauty, plain color,good shade Principle IntroductionYU HONG electric roller shutter system use 220V tubular motor (A built-in and external receiver for choice) for power, quiet operation, easy adjustment, strong driving power etc, it’s a upgrade product from manual roller shutter. Reelpipe is high ...