Custom Dynamics Magic Strobe RSG GEN 2 Brake Light Flasher Module For Harley Touring This unit gives you the ability to apply brake strobe flash patterns to the rear LED lights on your Bagger. It controls either the center taillight only, the rear turn signals only, or the rear turn signals and the center taillight together. Designed with a smart function that disables the strobe and flashing if the bike is simultaneously braking and turning. Dimensions: 4.2 x 1.4 x 0.6