Constrution Features:
1,The whole system without chain or cord control ,It's really safe.
2.No need to remove the whole system and limit switch ,It can adjust the limit position to get lower or higher.
3.Lower pull rope or lower beam 2-3cm,and the system will unlock automatically ,fabric rises at a constant speed under elastic force ,Pull down the rope or lower beam > 3cm ,Fabric stop automatically after release.
4.Roller blinds can be stopped at any height .
5.By adjusting the number of pre tightening turns of boost spring,the rising speed of roller blinds can be adjusted .
6,The system is equipped with limiter,which can limit up/down position of roller blinds.

Performance Features:
1.Min width:0.9mm
2.Max Height 3m
3,Max load 6kg