The metric bike conversion module by Kuryakyn makes the single filament or single circuit turn signals on the rear of your bike function as running lights, turn signals, & brake lights. Intended for use with LED, Halogen or other custom turn signals. It provides an optional signal for a 3 second pulsing brake light function to aid in the catching of drivers attention. The module wires in beneath your seat & works with stock or custom single circuit turn signals. When using stock or custom turn signals you will have to use red lenses or clear lenses with red bulbs. (Not included). It is unlawful to have amber colored rear running lights.