Sounds like they are using the trucks built-in accelerometer (usually used for stability control), rather than a height-sensor. If so, this is great, because the height-sensors tend to be the most finicky component on full-air-rides. The mechanical arms get damaged from road debris, and the magnetic ones have to be adjusted perfect or they won't work either.
2000 Ford E450 V10 VAN! 450,000+ miles
2014 ORV really big trailer
2015 Ford Focus ST