Available in various forms, but the ones in my supra are shockers with a little 3-way switch in them that is Hard, Medium or Soft. Switches turned by litte hats that sit on the strut towers, and system controlled by computer that reads speed, amount of turn on steering and whether the brakes are applied. There's a switch in the cabin to go from "Normal" - all soft to Sport "all medium". When turning hard or braking over 60 km/h all shocks switch to Hard. You can feel it when it works.
Do a search in tech section, it should all be there.