Utilizing advanced LED technology, these LED turn signals maximize performance with unique reflector technology and the most superior automotive grade LEDs ProBEAM« turn signals produce bright light output with a wider viewing angle The 24 red ProBEAM« LEDs showcase a smooth light that functions as a full-contrast turn signal for maximum visibility SMART Signal StabilizerÖ or Load Equalizer required when front or rear turn signals are converted to LED on '13-Earlier Harley-Davidson« Sportster«, '11-Earlier Dyna«, '10-Earlier Softail«, '13-Earlier Touring and Trikes and all V-Rod« models to ensure proper turn signal function and flash speed.. SIGNAL INSRT BLLT 1157 RD