The heart of this system is the "smart" algorithm sensor that automatically adjusts to varying load conditions. The sensor's programming also accommodates for changes in road conditions. This system contains all of the necessary components to transform a set of air springs into a maintenance-free self-leveling system. This system may be used with the Ride Control and Air Lift 1000 air spring kits. Eliminates in-cabin wiring and gauges. Maintains level ride height. Everything needed for complete installation of Smart Air system. This is a single sensor kit. Air springs sold separately.