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 right away, and the fuel efficiency of my K-car for commuting has improved. I recommend it. It's unopened. The label design has been changed. This product costs 6600 yen. 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 starts ●Reduced shift shock in automatic cars ●Reduced power loss when the air conditioner is running ●Improved fuel efficiency in city driving and highway 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