It is the most powerful motor (45mm) of the XSDC range yet assuring ultra
quiet performance. This feature allows the XS50 to keep the same acoustic
performance even moving multi band or big size shades. So while the motor
runs, all you will notice is the glare of the room changing with no noise! It
features a speed control algorithm which keeps constant motor rotation in
all load conditions for a perfect alignment of the blinds.