... entrance. 2,Convenient for customers. 3,Artistic. Automatic sliding door: --Anti-clamp function to make the mechanism more safe ... 3 open, 1/4 open, and so on. --The door's working time can be adjusted, 3 functions: always work ... ) --Good solution for accessories, for example, finger printer, remote control, push button, access keypad, security sensor, fire alarm... automatic door Sliding door operator