Superior Torus LED 2100 Lightbar comes in 9 different standard configurations. The configurations include 3-up (TRS3) and 4-up (TRS4) directional Torus lightheads, 6-up LED corners. LIT3KIT and vehicle mounting adapter included with standard bars, just include vehicle make and model/year when ordering. These lightbars comes with a basic central controller operations with selectable 12 flash patterns. These bars have a dimming mode and clear lens are standard. See the pictures for the differences in the 9 variates.