An updated touchpad from ARB allows provision for up to four ARB Intensity Solis Lights to be grouped and retain controls, including dimming. The Gen 2 version is the only touchpad that will make more than two Intensity Solis lights work correctly on your vehicle. In addition to one harness per Intensity Solis light, an ARB Solis Intensity Splitter Cable is required to complete the install of three or four lights.