1、Practical Repair Tools: Automobile circuit tester is a practical auxiliary tool designed in the process of automobile electrical and line maintenance and inspection. 2、Multifunction: Used to test battery voltage value, voltage polarity, conductivity, check lamp, check motor, track and locate short circuit, test poor grounding contact and other faults. 3、Advantage: With front lighting, voltage value display, voltage polarity test, polarity output, overload protection, 4.5M long test line. 4、Easy Operation: With the operation manual, clear and easy to understand, easy to use, no professional knowledge, but also easy to master the use of the method. 5、Widely Applicable: Power circuit probe tester supports all 6‑24V electrical system testing, including cars, pickups, SUVs, motorcycles, engineering vehicles, boats, etc