Item Type: Electric Circuit Probe Tester Material: ABS Operation Voltage: 6-24V DC Cable Length: Approx. 4m/13.1ft Overload Protection: 7A (When the current exceeds 7A, this item will disconnect the current automatically.) Applications: 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 Tips: 1. An alarm sound made by the item indicates that the circuit breaker trips off. 2. After the circuit breaker trips, it will reset automatically within 3 to 5 seconds. 3. After an alarm sound, if this item is still connected with the testing object and you keep pressing down the power switch, the circuit breaker will repeat the process of trip and reset automatically.1Excellent Function: The high quality electric circuit probe tester is especially designed to reduce diagnostic time in automotive electrical systems, assist to repair your vehicles fast and convenient. 2Convenient Operation: The electric circuit tester comes with about 4m long cable, which is less constrained by distance during the operation, and can deliver you a more easier testing process. 3Current Conduction: Automotive technician can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward after simply connected to your car battery. 4Short Circuit Protection: The power circuit probe tester is a comprehensive 6?24V DC test kit features short circuit protection and can test for bad ground contacts instantly. 5Ground Lead Design: The electrical system diagnosis tester tool allows you to track and locate short circuits, and can test for continuity with the aid of its auxiliary ground wire. 1 xElectric Circuit Probe Tester 1 x Manual