1、Function: The electric circuit probe tester is especially designed to reduce diagnostic time in automotive electrical systems, convenient in assisting to repair your vehicles. 2、Overload Protection: The power probe detector is designed with 7A overload protection, when the current exceeds 7A, which will automatically disconnect the current. 3、4m Cable: Comes with about 4m long cable, which is less constrained by distance during the operation, and can deliver you a more easier testing process. 4、Short Circuit Protection: The power supply circuit probe tester is a comprehensive 6‑24V DC tester with short circuit protection to instantly test for poor ground contacts. 5、Ground Lead Design: The Electrical System Diagnostic Tester tool allows you to track and locate short circuits and can assist ground wire test continuity. Item Type: Electric Circuit Tester Material: ABS, metal Application: 1. Continuity test 2. Test the polarity of the voltage 3. Check switches, relays, and switches of diodes, fuses, and circuits 4. Polarity test of cable and plug 5. Track and locate short circuits 6. Test the working voltage of the poor ground contact: 6-24V DCOverload Protection: 7A (When the current exceeds 7A, this item will automatically disconnect the current.) ） 1 x Electric Circuit Tester