Diagnostic scanner for car checking with 12-24V compatibility1、Dependable and Practical Tool: Automobile fault diagnostic cable is a fast, reliable diagnostic tool that acts as the link between the vehicle and the computer. It works on both new and old vehicles. 2、Automatical Adjustment: When the adapter is connected to the vehicle, the device will check the vehicle's battery voltage and automatically adjust it to the vehicle's 12 or 24V voltage level. 3、Sound and Light Warning: If the voltage is too high or too low, diagnostic tool will warn you with sound and light, as well as through the battery icon in diagnostic software. 4、Function Tab: With this function tab, you will be able to see the fit and tuning of a specific vehicle without you being around. Coupled with help texts as a guide,even in complex situations, you can plan and work efficiently, such as adjustment and programming. 5、Help Function: For most OBD functions, there are detailed instructions to help you diagnose. You will find step by step information on prerequisites, preparation and implementation of various functions, even the most complex functions can be performed simply.