Engine performance is greatly improved due to a more stable ignition which is brought about by the double effect of a strengthened earthing system and the noise filter circuitry that quickly suppresses noise when the ignition coil fires. *1 *1 Due to differences in electrical design, the increase in performance level will differ by car model. Wiring is only to engine and battery terminal. The specially low energy consumption designed LED allows you to check operation status without putting a strain on your battery. The compact case can be put above the earth cable and does not have to be fastened down. The circuit board has a waterproof coating and an internal fuse to give you extra assurance against wet conditions. Specs ·Compatible Car Models=DC12V vehicles ·Cable Length=1m ·Main Unit Size=35x50x20mm Ignition Earth System SPARK EARTH SES ¥5,800