The XTOOL Advancer AD20Pro is a wireless OBD2 scanner designed to help DIYers locate car issues before taking it to the dealer. It is an upgraded version of the AD10/AD20 with enhanced features such as fast BT 5.0 communication within an extended range of around 33 feet, making it a low-cost solution for car diagnostics. The AD20Pro can pair with both iOS and Android smart devices and can be downloaded from Google Play or the App Store. It offers a wide range of functions including Check Engine Light On, Full System Diagnostics, and 10 Modes of OBD2. This makes it a versatile tool for troubleshooting check engine light issues, passing the annual smog check, and keeping your car in good shape. One of the most notable features of the AD20Pro is its ability to perform full system diagnostics without fiddly cables. It detects all the DTCs of your car and provides DTC definitions, which is immensely useful for typical backyard mechanics to fix car issues or replace faulty components. It also has an Oil Reset function that allows you to maintain the oil light yourself as a professional at home. The AD20Pro perform 10 modes of OBD2 tests, including reading/clearing codes, reading live data streams in text such as volts, RPM, temperature, speed values, performing EVAP tests, and One-click I/M readiness for smog check. It also features Pre-Check I/M Readiness, Component Test, and Live Data to ensure that your car is ready for state emission tests, all components are functioning properly, and monitors are ready for the annual smog check to avoid fines. The XTOOL Advancer AD20Pro features Fault Code Definitions, which displays the complete definition along with the cause, so you don't need to Google any code. It also has a Fault Warning function that sends warnings to your smart device when your vehicle has fault codes or the coolant temperature is too high, ensuring safer driving. The AD20 Pro has an extensive vehicle compatibility, working on most 1996 and later American, European, and Asian 12V cars, and supports all OBD2 protocols, including the newer CAN protocol. It comes with a Vehicle Management function to add and record the information of vehicles for easy and fast checking while performing daily diagnosis. It also has multilingual options that allow you to switch the language you need at will to use the app without translation. The XTOOL Advancer AD20Pro is covered by a 2-year warranty and 24/7 tech support with lifetime free updates. If you need any assistance, you can reach out to the manufacturer directly via email for fast replies. Overall, the XTOOL Advancer AD20 Pro is an affordable and versatile OBD2 scanner that provides a plethora of functions, making it a must-have tool for DIY car enthusiasts.