VERSATILE: The automotive voltage tester is suitable for diagnosing all electrical systems in vehicles with 6 to 24 V DC. It can check switches, relays, diodes, fuses, and circuits, helping reduce diagnostic time in vehicle electrical systems. POLARITY AND CONTINUITY TESTING: This power circuit probe allows quick identification of positive and negative polarity in automotive electrical wires and connectors. It can also test continuity and perform a bypass using the included ground cable. TRACKING & LOCATING SHORT CIRCUITS: The current tester uses high-sensitivity probes for fast and accurate detection. With the continuity tester, you can efficiently troubleshoot vehicle wiring and quickly locate faulty wires and fault points. COMPONENT ACTIVATION AND TESTING: This automotive test lamp can activate components within or outside the vehicle's electrical system to test and verify functionality, especially when component current exceeds the circuit tester's rating. HUMANIZED DESIGN: The auto tester features a 13.5ft cable, allowing easy access to various electrical systems. The LED display and buzzer provide clear fault indication. The clips have strong gripping force to stay securely in place. Product details: Color: red/blue Operating voltage: 6-24V DC Cable length: 13.5ft Overload protection: 8A (automatically cuts off power when current exceeds 8A) Package size: 27.6 x 9 x 4cm Package weight: 320g Packing list: 1 x circuit tester 2 x manual