The ASP-01 staircase automatic switch is used to control lighting in corridors or staircases. After the system is triggered, it turns on the lighting for the time set by the user, followed by automatic shutdown. The working time can be smoothly adjusted in the range from 10 s to 16 min using a potentiometer. The ASP-01 staircase automatic switch can also be used as a time relay with a delayed switch-off function. The design of the device allows for mounting under a button in a deep fi-60 installation box.