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, and the on/off switching of diodes, fuses, and circuits, helping reduce diagnostic time in vehicle electrical systems. POLARITY AND CONTINUITY TESTING: This power circuit probe allows quick determination of positive and negative polarity in automotive electrical wires and connectors. It can also test continuity and perform a bypass using the additional ground cable. TRACKING & LOCATING SHORT CIRCUITS: The current tester uses high-sensitivity probes to provide fast and accurate detection. With the continuity tester, you can save time when troubleshooting vehicle wiring and quickly locate faulty wires and fault points. COMPONENT ACTIVATION AND TESTING: This automotive test lamp can activate components within and outside the vehicle's electrical system to test and verify if they are defective, especially when the component's rated current exceeds that of the circuit tester. HUMANIZED DESIGN: The auto tester features a 13.5ft cable, allowing easy access to various electrical systems. The LED display and buzzer warning help identify issues at a glance. The clips have strong grip force, reducing the chance of disconnection during use. 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