The 3S is AirLift Performances new standalone Control System. This is a more basic system compared to the 3P and 3H systems. Manifold looks just like 3P/3H but it has threaded ports on the back side so you can add pressure sensors or run gauges. There's no sensors inside the manifold.
You can run the system via the App only, or you can run a 3P/3H controller, V2 controller or a switch box of some sort like the AVS switch box.