Eco obd2: low fuel consumption and low emissions Blue: diesel car Green: Gasoline car Nitro obd2: more power / torque Red: diesel car Yellow: gasoline car EcoOBD2 is a Plug&Drive Ready device. EcoOBD2 is easy to install. Just plug it into the OBD2 connector of cars. EcoOBD2 fits all car from the year of 1996. It works based on OBD2 protocols as remapping the Car's computer ECU. After driving 200 km road total, EcoOBD2 adjusts itself to the car, according to the drivers' habits and always keeps remapping the ECU to save fuel lower and immission. According to your driving habits, EcoOBD2 makes a new map in the car's computer ECU for the vehicle's low fuel consumption. As you driving much more KM/Mile, it renews the map and adjusts itself to match your car perfectly for more fuel saving. Package Included: 1X Nitro obd2 Eco