Mine was the prototype. The unit is simply placed into the wiring loom of the air suspension controller.
The controller for the unit is a simple knob. Turning it left lowers the suspension. Turning it right effectively engages the next highest suspension setting. So, one click right - clockwise - makes road height Offroad 1 and tuning it again makes off road 1 into Offroad 2.
This means you can drive faster without the car lowering.
Cheers
Numb Thumbs.
PS. It is basically the same as the LLAMS for the Discoveries that has been around for many years.