Usage Tips:And EcoOBD2 finds out the hidden power of your car.<br> Up to 15% fuel saving ECOOB2 chip tuning is very easy to use Plug ECO OBD2 chip tuning into OBD2 connector of your car.<br> And turn the ignition on for 30 seconds.<br> And Turn the engine on ECOOBD2 chip tuning settings are optimal and the best for your car.<br> Even the parameters are different for each vehicle, there might not be a need to make an additional adjustment ECOOBD2 chip tuning will recognize your vehicle and your driving habits after around 200 km/150 miles driving, and then Nitro chip tuning adjusts itself to match your car perfectly Packageinclude:1x Car Fuel Saver Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures.<br> 2. Please allow 1-3cm error due to manual measurement.<br> (1 inch = 2.54 cm) Thanks for your support :)