Dimmer

Minimum and maximum brightness
Minimum and maximum brightness: many lights only have a noticeable change in brightness within a certain range. Hence you can set a minimum and maximum brightness level so that the button can adjust brightness only between the minimum and maximum brightness levels.

Fade in time
This is the time that the light is to take to reach the desired brightness from being switched off.

Dim speed
This is how fast the brightness is reached when the button is pressed continuously.