Practical Design: This car plug and driver tuning setting is the best setting that suits your car best. Even if the parameters of each car are different, additional tuning may not be needed. After driving about 200 kilometers, it will adjust to recognize your vehicle and driving habits. Function: This fuel-saving tool can find out the hidden power of your car, which can help you increase 35% of power and 25% of torque, save your car consumption, improve driving experience, and help you save some unnecessary expenses. Adjustment Installation and Calibration: This car plug and driver is simple to use. Remove the car key from the ignition switch. Find the connector in your car, then insert this car plug and drive to adjust. Insert the key into the ignition switch and twist the key to the first stage, press and hold the reset button for about 5 seconds. After releasing the button, just wait for about 30-54 seconds. Easy to Install: This car plug and driver is simple to install and does not require a complicated operation process. It is a plug and play device that can improve the performance of the engine. When it is plugged into the connector, it receives information from the on-board computer. Product List: The package contains 2 car fuel saving tools, which are enough to meet your daily needs. You can insert it directly when you need it. The packaging adopts blister and cardboard, which makes you more assured.