DUOYI DY18 Car Circuit Tester Probe Diagnostic Tool 12V 24V Current Voltmeter Features 1. It is the best electrical tester for reducing diagnostic time in automotive electrical systems. 2. Its long cable makes your testing easily. 3. After a simple hook-up of the unit to the battery of vehicle, automotive technician can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward. 4. It has short-circuit protection and can test for bad ground contacts instantly. 5. It allows you to track and locate short circuits. 6. It can also test for continuity with the assistance of its auxiliary ground lead. 7. It is a comprehensive 6-24V DC test kit. Application 1. Test for continuity 2. Test for polarity of a voltage 3. Check switches, relays and the on-off of diodes, fuses and circuits 4. Test for polarity of electric cables and plugs 5. Track and locate short circuits 6. Test for bad ground contacts Specification 1. Operation voltage: 6-24V DC 2. Cable length: about 4m 3. Overload protection: 8A (When the current exceeds 8A, this item will disconnect the current automatically.) 4. Size: 220 x 20mm 5. Weight: about 200g