Roller Blinds
Roller blinds are a type of window covering that use a motor to control the blinds’ movement. The motorized blinds use either a chain or belt to move the panels, which can be closed or opened by the user. Roller blinds in Auckland work by using a mechanism called a pulley system. When the user pulls on the cord, it causes the weights at the bottom of the pole to rotate, which in turn moves the slats up and down. This motion is translated into the movement of the panels on top.
For More Info:-http://www.groovyfreeads.com/services/other-services/roller-blinds_i1615558