Features: Automotive battery tester, we can check the overall health of the battery, including the cranking test, and run a complete system charging test. The cranking test is to test and analyze the starter motor to check if the starter motor is working properly, and the charging test is to check the state of the charging system to avoid damaging the battery. It is much more convenient than driving a few miles to a nearby auto repair store. Compatible with cars, motorcycles, trucks, RVs, ATVs, SUVs, boats, yachts, mowers, and even golf carts. Plug-and-Play, and it provides Accuracy testing reports within seconds, greatly improved the testing speed compared to other battery testers. It also has a polarity reversal protection function. The clip reversal will not damage the tester, and will not have any adverse effects on the car and the battery. Can directly test the loss of power battery, no need to be fully charged first and tested. Using the newest BT technology to detect the car battery, you no longer have to stand in front of the car waiting for your testing work, after connecting the car battery you can open the app on your phone/tabletfor car battery testing work, which is customer friendly and easy to use. Package Includes: 1x Battery Tester 1x User's Manual Specifications: Material:ABS Size: Approx.10.6x2.8x1.65cm/4.17x1.1x0.64in Color:Black/Silver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.