Features: 1.The unit is the best electrical tester for reducing diagnostic time in automotive electrical systems. 2.5m/16.4ft long cable designed makes your testing easily, which is flexible to use. 3.After a simple hook-up of the unit to the vehicle's battery, automotive technician can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward. 4.The unit has short-circuit protection and can test for bad ground contacts instantly. 5.It allows you to track and locate short circuits, which is practical to use. 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, features stable and professional performance. Specification: Condition: 100% Brand New_x000D_ Item Type: Car Electric Circuit Tester_x000D_ Material: ABS_x000D_ Color: As picture shown_x000D_ Working Voltage: 6-24V DC_x000D_ Cable Length: Approx. 5m/16.4ft_x000D_ Overload Protection: 8A (when the current exceeds 8A, this item will automatically cut off the current)._x000D_ _x000D_ Applications:_x000D_ 1. Test for continuity_x000D_ 2. Test for polarity of a voltage_x000D_ 3. Check switches, relays and the on-off of diodes, fuses and circuits _x000D_ 4. Test for polarity of electric cables and plugs_x000D_ 5. Track and locate short circuits_x000D_ 6. Test for bad ground contacts_x000D_ _x000D_ Operation Instrcution:_x000D_ Unroll the unit's cable_x000D_ Clamp the red clip to the positive terminal of the vehicle's battery_x000D_ Clamp the black clip to the negative terminal of the vehicle's battery PackageList: 1 x Car Electric Circuit Tester1 x Manual