Eco OBD2 will adjust itself to match your car perfectly for more fuels saving. EcoOBD2 Saves 15% fuels for Benzine cars. Plug & Drive Ready device. Easy to install. Just plug it into the OBD2 connector of cars. Widely applicable: It works based on OBD2 protocols as remapping the Car''s computer ECUOBD2. Fits all cars from the year 1996. Name: Eco OBD2 Performance: 15% economic fuels savings Installation and Calibration 1Find the car OBD interface, then plug in the device. 2This one is more critical, twist the car key and turn on the ignition switch. (Do not start the car) 4Press the reset button of the device for about 5 seconds, release the button and wait for a moment about 30-54 seconds (the device will establish a connection with the ECU) 5Start the engine. 6. The device will automatically recognize the owner''s car model and driving habits, and after about 200 km (150 miles) of a break-in, the device will automatically adjust to make the engine power reach the optimal effect. Packing list 1 x Eco OBD2