The Best AD20Pro (AD20 update version ) 1. AD20pro supports the Full system diagnosisof the car and supports reading error codes and clearing codes in the system,like Engines/Auto Transmission/Airbags... and other systems2. AD20Pro supports Bettery Test (continuously caring about the health of the car battery) and maintenance light reset function3. AD20Pro supports OBD2 function code reading/clearing/data stream/and Smog Check/throttle valve carbon deposition test and other functions4. AD20Pro supports driving records and driving analysis functions The recorded data includes the distance traveled each time, fuel consumption, driving behavior, etc.5. AD20Pro supports HUD and smart meter function(Smart meter keep update )6. AD20Pro supports free software and continuous software updates, and high-quality hardware supports Bluetooth 5.0 The ELM327 PK AD10PK AD20 And AD20pro different AD20Pro Including all AD10 AD20 and ELM327 functions Already, and the AD20pro can more functions on diagnostic on battery test ..... AD20 pro software keep update more and more functions will been Found !