1.High visibility LEDs incorporated into Edge Pointer help ensure safe night driving. 2.Edge Pointers are solar :powered, allowing them to be used for isolated or stand-alone applications. 3.Switch "right" to choose flashing, "left" for steady lighting and "middle" to stop function and save energy ,adjust it to the proper state according to your specific requirement before installation. 4.An ideal product for High Way, park lot, road etc and can be widely used in similar traffic projects.