DC voltage tester EM285 for vehicles with circuit probe1、This comprehensive 6‑24V DC test kit is the best electrical tester to reduce the diagnostic time of automotive electrical systems. 2、With short‑circuit protection and can test for bad ground contacts instantly; Overload protection, when the current exceeds 8A, it will automatically cut off the current. 3、After simply connecting to the vehicle's battery, the car technician can conduct the positive and negative battery current to the tip by shaking the power switch forward or backward. 4、About 4 meters long cable, its long cable makes it easy for you to test. And the probe is a detachable design, which is convenient for safe storage when not in use. 5、Allows you to track and locate short circuits, and you can also test continuity with the aid of an auxiliary ground wire.