Features: Wide range applications: circuit tester can be used to test continuity, test polarity of a voltage, check lamp, check electric motor, follow and locate short circuits, test for ground contacts etc. Long test lead: The cable length is about 16ft which allows you to test any electrical system easily. Short-circuit protection: The unit has short-circuit protection and can test for ground contacts instantly. Easy operation: 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. Comprehensive 6-24V DC test kit: Do not use on AC voltage. Specifications: Type: Circuit tester Material type: metal+ABS Color: As shown Operation Instructions: Unroll the unit's cable Clamp the red clip to the positive terminal of the vehicle's battery Clamp the black clip to the negative terminal of the vehicle's battery Operation Voltage: 6-24V DC Cable Length: 16ft Overload Protection: 8A (When the current exceeds 8A, this item will disconnect the current automatically.) Package Contents: 1 x circuit tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.