What do you want to know?

It's controlled via pushbutton with 4 settings with 1 to 4 led's showing to indicate what setting is active.
You can change setting at any given speed.

Setting 1 is so soft the car wallows
Setting 2 is nice and firm, it's the standard setting when you start the car
Setting 3 is very firm
Setting 4 is ridiculous, very harsh ride, you'll feel every ridge in the road.

Costyly when it breaks as replacing the complete shock is the only option as far I'm aware.