Feature: 1. Multifunctional: Circuit testers can be used to test continuity, test voltage polarity, check lights, check motors, track and locate short circuits, and more. 2. Short Circuit Protection: This circuit tester unit has a short circuit protection function, which can instantly test for poor grounding. 3. Long Test Cord: The cable length is approximately 16ft, allowing you to easily test any electrical system. 6‑24V DC tester, do not use under AC voltage. 4. Simple to Operate: With the tester connected to the vehicle battery, an automotive technician can conduct positive or negative battery current to the tip by rocking the power switch forward or backward. 5. Automotive Diagnostic Test Tool: Once you connect the power probe Tool to your car battery, you will get all kinds of amazing diagnostic features. Specification: Item Type: Electric Circuit Tester Material: ABS Voltage: 6-24V Applicable Models: Universal . Package List: 1 x Electric Circuit Tester