1. - Up to 35% more power - Up to 25 % more torque Yellow one is for Benzine/Petrol Cars， Red one is for Diesel Cars.2. Lower Fuel and Lower Emission Green one is for Benzine/Petrol Cars， Blue one is for Diesel Cars.Installation and Calibration1 - Pull the Car Key out from the ignition.2 - Find OBD2 connector(*) in your car and Plug in EcoOBD23 - Insert the key into the ignition and twist the key to the first stage. (Do not start the car)4 - Press the reset buttom for about 5 sec. After releasing the buttom， just wait for a while about 30-54 sec. (EcoOBD2 will communicate and establish connection with ECU)5 - Start up the engine.6 - EcoOBD2 will recognize your vehicle and your driving habits， after around 200 km/150 miles driving and thus EcoOBD2 will adjust itself to match your car perfectly for more fuel saving.Package content:1 x ecoOBD2 Chip Tuning Box Interface