Designed specifically to work with OEM alarm systems (TSSM) or turn signal module (TSM). Eliminates erratic blinking of turn signals. Compatible with most custom turn signals (including halogen and LED signals). Solid-state waterproof module. Produces absolutely no heat so it is OK for parade use; allows emergency flashers to be used for any amount of time. For use on models with self-canceling turn signals. Made in the U.S.A.. One module needed per pair of signals being equalized..