This diagnostic code reader is an upgraded version of AD20. It is a smart diagnosis terminal that communicates with your Android/iOS devices via BT 5.0 through the Advancer App. AD20 Pro diagnostic car scanner provides OBD2 functions and in-depth checks for all available modules. Besides, it can recode trips, do the performance test of the car, monitor and analyze driving habits, rest maintenance light and support the HUD function. AD20 Pro coder reader is NOT limited to one car, which means you can bind it with serval cars at the same time. Currently, it has 3 language options, English, Spanish and Russian. But with the update of software, it will have more language options very soon. And Yes! Please Pay Attention: AD20 Pro can't be used alone. The Advancer App has to be downloaded to your Android/iOS devices to work together. Only Support 12v cars, not 24v trucks. Only read and clear error codes for all systems.