SICASS racings turn signal flasher works with all types of turn signals, including LED's.
No extra switches needed.
No battery draw.
No extra ground wire.
If you plan to use LED turn signals on the front and rear, then you will need to use the smart flasher.
If running one set of LED and one set of standard bulb turn signals you shouldn't need to install the smart flasher. In this case the turn signals will blink slightly faster.