Load Equalizer eliminates rapid flashing of turn signals. Can be used with most custom turn signals (including halogen and LED signals.) Plug and play waterproof module works specifically with HD OEM alarm systems (TSSM) or HD turn signal module (TSM). 100% solid-state and produces virtually zero heat, unlike load resistors. Emergency flashers may be used for an extended amount of time For use on models with self-canceling turn signals. Made in the U.S.A.