Constrution Features:
1,The whole system without chain or cord control ,It's really safe.
2.pull down the lower beam ,the roller blinds will fall,and stop when you release it ;lift up the upper beam,and the roller blinds will rise,and stop when you release it .
3.Roller blinds can be stopped at any height .
4.By adjusting the number of pre tightening turns of boost spring,the rising speed of roller blinds can be adjusted .
5,The system is equipped with limiter,which can limit up/down position of roller blinds.

Performance Features:
1.Min width:0.85mm
2.Max Height 3m
3,Max load 6kg