Feature:

1.Positive pull the chain, roller blinds down, reverse the chain, head only unlock, roller blind automatically up.

2. The system is equipped with retarder, and the roller blinds automatically rises at a uniform and stable speed.

3.Roller blinds can be stopped at any height.

4.1: 1.5 reduction ratio is adopted for the clutch making, which makes it easier to the chain.

5.The system is equipped with a limiter, and the roller blinds will automatically stop when it rises /falls to a fixed position.

6. The clutch used mental-core technology.