elevator fitting,elevator motor,elevator component HALL OPERATIONAL PANEL HK2000-D5 Main function: 1.Display the elevator postion used in elevator cab or hall.(6*7 square dot matrix) 2.Adopt special RS485 series communication to deal with hall calling signal. 3.Up and down arrow is single,prompt flickeringly. 4. You can chose the function.For example:over load ,full load ,maintenance ,driver ,up or down light and so on.