use. 1.Test main menu After connecting the vehicle,enter the home page,select the OBD/EOBD menu,and press OK to enter the test function page.This menu has 9 test functions,and you can use the function keys to go up and down the page.If the fault lamp cannot be cleared,turn off the engine and start to clear the fault lamp. 2.View data The vehicle data stream is a series of parameters about the current running state of the engine and vehicle read from the vehicle OBD interface. 3.Fault code query I/M ready Input fault code query,and the product will analyze its fault code definition 4.Connect the vehicle and enter the home page Select the I/M menu and press OK to enter the setting page.This menu has two functions.You can use the up/down function keys to turn pages.The I/M Ready function is used to verify whether the vehicle emission system operates according to the OBD2 standard. 5.Voltage Test Select the test voltage to read and check the vehicle battery voltage 6.Adjustment Access the configuration screen to adjust the product language and units of measurement ***Purchase description*** 1.If you have any questions about the product,please contact our after-sales personnel to help solve the problem.Don't open the customer's complaint at will,because it will delay the return or refund,and will not help solve any problems.Our after-sales personnel spend most of their time online.If you have any questions,please feel free to contact us.We can solve this problem as soon as we see the information.We apologize for the inconvenience.Happy shopping Contact customer service: go to buy>find this purchase>send information (central blue round button) 2.You have other questions or comments In the question section,we ask your questions.We are here to serve you.We are happy to answer any questions as soon as possible. 3.Why buy us? The product will be shipped immediately.They are in the Mercado Libre repository and are therefore the fastest and safest delivery method available. Thank you for your choice,we serve you