Our Harley specific handlebar Mount Turn Signals are designed with a powder coated cast aluminum housing as well as a clear (flashes amber) UV/impact resistant polycarbonate lens to help illuminate the bright LED units. The signals have 3 wires (Ground, Run, and Turn/Brake) and are designed for ECE/DOT compliance for road use. Our turn signals are a bright and responsive LED replacement for the stock lights that come on your motorcycle. Note: An LED load equalizer may be required to maintain correct blinking speed and operation (any off the shelf unit will work).