Item specificsColor: YellowLength:10 cmWeight:40g Type: Code Reader Material Type: plastic and metalHeight: 6 inch Support models:Most OBDII car models Special function: Fuel Optimization tool 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.