16V24V Battery Checker: Work on all 6V, 12V and 24V batteries (1002000 CCA) to ensure the output voltage of the generator is in a regular condition, the rectifier diode works fine and the charging current is normal status, and the testing result up to 99.99% accuracy. 2Large Color Screen: The battery analyzer adopts a 3.2in large color screen to make sure you can read clearly even in the dark or in strong sunlight, about 8.8ft long connection cable and enhanced the clips to reduce the measurement error. 3Voltage Waveform Function: Catch the voltage changing and show the waveform into graphing, up to 20 points in 1s, helps to track the realtime voltage and find the battery issue. Even can be uploaded to computer compare them to analyze the incar system. 4Cranking And Charging System Test: The superior battery tester could provide overall batteries data in milliseconds including voltage, internal resistance, cold cranking amp, battery health and charge status. 5Alternator And Starter Tester: The car battery tester can not only perform its professional battery analyzer functions, but also an excellent alternator and starter tester that can help you diagnose the car's starting system. Item Type: Digital Battery Tester Material: ABS + Rubber Features: The Battery Tester can test all 6V, 12V, 24V automotive cranking battery, including ordinary battery, AGM flat plate battery, AGM spiral battery, and Gel battery, etc. It adopts the state-of-the -art conductance testing technology in the word to easily, quickly and accurately measure the actual cold cranking amps capability of the vehicle starting battery, healthy state of the battery itself, and common fault of the vehicle starting system and charging system, which can help maintenance personnel to find the find the problem quickly and accurately, thus to achieve quick vehicle repair. The performance of the starting and charging system depends on the health of the battery. It is necessary to check the starting and charging system after confirming that the battery is in good performance and fully charged. During the in-vehicle test, the tester will further test the starting and charging system. Multiple language for selection: Chinese, English, German, French ,Japanese, Korean, Dutch, Russian, Spanish, Italian, Portuguese, Polish, Persian. Noted : If test on the vehicle, please make sure to disconnect all loads, and don't out the key in the ignition position and must close the door . Connect the red clip to the positive (+) terminal of the battery and the black clip to the negative (-) terminal. After connecting, shake the clip back and forth to make the connection firm. Before testing the battery, two clips are required to connect the terminals firmly.The best test location is the connection port of the battery. If the battery cannot be connected from the wiring port, you can try to test on the jumper port, but the measured data may be lower than the actual value. Function: 1. 3.2in EXTRA LARGE TRUE COLOR SCREEN 3.2in is a more bigger screen size on all digital battery testers. Besides a true-color screen that all the icons are colored elements ensure you can read clearly even the dark night or strong sunlight. 2.