NEW Green and yellow are for benzine cars， blue and red are for diesel cars. What is the ecoOBD2?ecoOBD2 is a Plug&Drive Ready device to function the reducing fule consumption for the economy and lower emission for the world. ecoOBD2 fits all car from the year of 1996. It works based OBD2 protocols as remapping the car's computer ECU. After driving 200 km road total， ecoOBD2 adjust itself to the car， according to the drivers habits and always keeps remapping the ECU to save fule lower and immission.What is the nitroOBD2?nitroOBD2 IS a Plug&Drive ready device to function the increasing the preformance of engine. nitroOBD2 fits all car from the year of 1996. It works based OBD2 protocols as remaping the car's computer ECU. After driving 200 km road total， nitroOBD2 adjusts itself to the car， according to the driver; habits and always keeps remaping the ECU to increase the performance of engine.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.Certificates : CE / FCC / RoHSWeight : 40 gBlue: diesel cars/ecoOBD2Green: benzine cars/ecoOBD2Red: diesel cars/nitroOBD2Yellow: benzine cars/nitroOBD2Package content:1 x OBD2 Chip Tuning Box Interfacehttp://contestimg.wish.com/api/image/rating?name=b426702c7b8911e68b9c065f903a9ac5.jpg&w=1000&h=1000&m=0&t=0