Their H-D specific mount turn signals are designed with a powder coated cast aluminum housing as well as a clear UV/impact resistant polycarbonate lens to help illumiate the bright LED units. The signals have 3 wires and are deisnged for ECE/DOT compliance for road use. The turn signals are a bright and responsive LED replacement for the stock lights that come on your motorcycle. Designed with a black powder coated cast aluminum housing, as well as a UV/ impact resistant polycarbonate lens to help illuminate the bright LED units Ground, run, and turn/brake Bright and responsive LED replacement for the stock lights that come on your bike Load equalizer may be required to maintain correct blinking speed and operation