1.Car Battery Tester---A great helper for checking the health, cranking and charging of the car battery, so you can accurately know whether the battery needs to be replaced or just recharged.Save your time and money.2.Wide 12V Application---This universal battery tester fits all 12V charging systems, including ordinary flooded, flat plate AGM, spiral AGM and GEL batteries for vehicles, forklifts, hybrid cars, SUVs, vans, boats, campers, motorcycles, travel trailers.3.6 LED Digital Display---6 intuitive LED lights show battery and alternator status, green means good/full, orange means medium, red means low.Super simple.No need to know the voltage, you directly indicate the quality of the battery and the alternator.4.More precision and quick response---2 copper clips more sensitive and precise, get results as soon as possible.5.Safety and simplicity---The reverse protection function prevents burnout caused by improper operation between the battery (+) terminal and the cable (-) terminal.Anti-slip design allows you to use it flexibly even with gloves.