1. steady function, sensitive reaction, low noise

2.The case shell is made of thickened steel which is shaped by 13 process flow. Without fading ,waterproofing, not rusty, durable.

3.high sensitive limit switch, pole can be instant turn on and off .accurate location.

4.control system adopts hi-tech digital chip technology.

5. the anti-collision function. Protecting the passenger

6. the inductive function ,with the digital vehicle detector

7.the movements adopts the most steady running mode –non-constant speed mode. Or the variable speed excogitation. (Slow – quick – slow ) .This function makes the operation steady and prolongs the working life.