Eco OBD2 automatically adapts to your car to save more fuel. EcoOBD2 saves 15% fuel for petrol cars. Plug & Drive Ready device. Easy to install. Just plug it into the car's OBD2 connector. Wide application: It works based on OBD2 protocols as remapping the Car's computer ECUOBD2. Fits all car from the year of 1996. Name: Eco OBD2 Performance: 15% fuel saving Installation and Calibration 1 Locate your car's OBD interface, and then plug in device. 2 This is more critical, turn the car key, and turn on the ignition switch. (Do not start the car) 4 Press the reset button on the device for about 5 seconds, release the button and wait a while, about 30-54 seconds (the device will establish a connection with the ECU) 5 Start up the engine. 6. The device will automatically recognize the owner's car model and driving habits, and after about 200 km (150 miles) of running-in, the device will automatically adjust to match the engine power to achieve the optimal effect. Packing list 1 x Eco OBD2