I have installed this on my car and motorcycle for commuting. I bought another one to install on my other car, but my wife said, "It's only for commuting," and I ended up putting it up for sale. The effect was that the starting performance of my Majesty S improved dramatically after installation. The Majesty S is notorious for its poor starting performance in cold weather, but it now starts with a single push of the button, and the fuel efficiency of my K-car for commuting has improved. I recommend it. It is unopened. The label design has been changed. This is a 6600 yen product. Please search for Ultra C-Max/E-PRO by Puma Co., Ltd. ●Effects of Installation● ●Improved torque and power across the entire range ●Stable idling ●Improved throttle response ●Smooth engine start ●Reduced shift shock in automatic cars ●Reduced power loss when the air conditioner is running ●Improved fuel efficiency in city driving and high-speed driving ●Increased headlight brightness ●Improved quality of car navigation LCD screen ●Improved sound quality of car audio as a 2.6F audio capacitor ●Reduced burden on the battery