When you reach the top or bottom of the stairs, the motion LED controller automatically turn on the lights and turn it off when people leave Equipped with antileakage systems, DC12V-24V, Stable output, adjustable step count (up to 32 steps Adjustable speed, with night light mode, running light mode, following mode, every two lights on mode, all lights on or off mode Equipped with anti short circuit function, the port is not burned out, and the short circuit area is properly treated for continued use Short press to set the number of stair light controllers, clicks the button until all lights are on, up to 32 stair lights can be controlled, long press to confirm again