Car Fuel Saver/ Economizer Highlights: • Fuel saving from 5% - 20% • Will increase your car's mileague just by plugging it into your cigarette lighter socket. • more horsepower， better accelleration， longer battery life， and cleaner emissions. • Improve engine power， better acceleration response， hence improve fuel saving. • Test analysis showered that the fuel consumption rate improved by 15.3% with the use of Fuel Shark. • Fuel shark compensates and stabilizes the voltage supply， the result shows an improvement in fuel consumption. • Different vehicle types， models， and year of the vehicle will affect results. • Easy installation， totally DIY， the first choice for ladies drivers. • Universal for all cars Notices: • Do not disassemble or modify this product to avoid damage or injury. • Only designed for 12V cigarette lighter sockets. Do not use with 24V sockets. • Do not plug in and out from the cigar-lighter socket during driving. • When install， please make sure the plug of SOCKET is securely in contact with the socket. • If the cigar-lighter socket is loosened due to previous usage of other charging device， please adjust the contact point inside the socket before plug in. How Does Fuel Shark Socket Work ? This is a new application of an old technology. Basically， it acts like a small battery that helps your car's electrical system perform better. The small device is fitted with a capacitor  that once plugged in to your 12v adapter  is instantly connected to the car's main electrical system. (capacitors are also commonly used to power the electronic flash in cameras) The capacitor first charges and then discharges the stored electricity (voltage) when there is a heavy energy demand from the alternator. Heavy energy demand (reduced voltage) is caused by using any electrical accessory in your car including lights， windshield wipers， air conditioning， stereo or any combination of them. Instead of the alternator and battery having to work overtime， Fuel shark supplements the required voltage to reduce the load on the electrical system from any accessory that is being used. The reduced electrical demand frees up energy that can be better used to deliver a more constant and steady supply of electricity to the spark plugs and ignition system. The result is a more efficient and complete combustion of the gasoline which will improve you gas mileage and produce cleaner emissions. You will also get better horse power， acceleration， and a smoother running engine despite daily driving conditions. The fact is that fuel mileage will fluctuate in any car due to driving habits， lack of maintenance， traffic conditions and many other factors. All these factors will rob the fuel efficiency your car was meant to achieve. The main purpose of Fuel Shark is to help your engine consistently maintain its designed fuel efficiency despite of all these unpredictable situations.