Designed to prevent hyper flashing turn signals due to lower load of LED turn signals. This unit is in a 100% solid state with thermal protection and produces absolutely no heat. Fits all 1996-2013 FLH models, 1997-2013 FX & Dyna Models, and 1999-2003 XL Models. Except 2010-Up Street & Road Glides, 2011-Up Softail, 2012-Up Dyna, and Rocker Models. Compatible with all CyronMotor LED turn signals, custom LEDs, and halogens. Plug and play makes for easy installation after removing the seat.