【Accurate BM310 Battery Tester】: The battery tester provides you with an easy way to check battery health and alternator function. You don't need to leave your home and spend a lot of time and money to check your battery level and keep yourself safe behind the wheel. 【Universal】: This automotive battery tester is for all 12V charging systems, including regular flooded, AGM flat plate, AGM spiral, and GEL batteries for cars, forklifts, hybrid cars, pickups, boats, RVs, motorcycles, caravans. 【Clear at a Glance】: Six LEDs show battery and alternator status, green for good/full, orange for medium, and red for low. Intuitive, simple, and clear. You don't need to know the voltage, we directly tell you the quality of the battery and alternator. 【Durable Material】: The 12V battery analyzer is made of high-quality ABS material, pure copper wire, and clips with good conductivity and high sensitivity, non-slip design allows you to flexibly use it even with gloves on. 【Easy to Use】: Attach the test clips, the red and black, to the battery to be tested, connect the red to the positive terminal and the black to the negative terminal, and the corresponding LED indicator on the tester will indicate. (Note: Do not use for too long!)