Better Throttle Response. •Stabilizes idling as well as increases air conditioning efficiency. •Quick engine start by improving ignition system. •Less engine noise. •Optimize electrical equipment performance to extend the lifetime of car. •Build-In Electrical Noise Filter. Reduce stereos interference and improve the brightness of headlights. •Build-In LED indicator shows the condition of the generator and capacity of battery. •Made in Japan. The quality you can trust.