functions: 1, Multiple vehicle applications -12V passenger cars, mini vans, light duty battery. 2, Tests multiple battery types- regular flooded, AGM flat plate ,AGM spiral and gel, etc 3, Tests all battery rating systems-CCA,BCI,CA,MCA,JIS,DIN,IEC,EN,SAE,GB 4, Tests the batteries on the car directly- no need to remove the battery 5, Directly detects bad cells 6, Quick and accurate test result display in just 3 seconds 7, Tests 12v charging system, advanced starter /alternator test 8, Quick starter analysis without disabling the ignition 9, Does not emit light, heat or spark ,or discharge battery-keeps operation safe 10, Automatic temperature compensation 11, Ripple voltage test for easy and intuitive check of faults 12, Feature with reverse polarity protection: reverse connection may not.