Introduction If your cars Check Engine Light is on, you need this device. AutoScanner is a handy device for reading and erasing trouble code for your vehicles. It is small in size, fashionable in design, competitive in price and easy to use. This is a stand alone unit, it does not need a laptop computer to operate. By simply connecting AutoScanner with the diagnostic socket, the user will be able to read the trouble code, identify and locate the troubles by consulting the trouble code description on the users manual. Each trouble code discovered will be displayed on AutoScanner for 3 times. 3 cycles later, all the trouble codes will be automatically erased. To prevent the code being erased simply remove the unit. It has two dynamic control keys, very convenient in operating.