The Electric Circuit Tester is made of high-quality ABS plastic and stainless steel, heat-resistant, moisture-proof and high sensitivity. Also design with Overload Protection, Once the current exceeds 7A, this item will disconnect the current automatically and make out a buzzer sound. Wide Functions: The power circuit tester comes with 13Ft extended detection lead and LED indicator, so that it is safely and efficiently applying to voltage test, positive/negative electrodes detection, components activation, continuity and grounding test, trailer lights and connectors test, short circuits inspection. Various Application: The portable electrical tester is widely working well on all 6V-24V DC automotive electrical systems, such as cars, trucks, ships, trailers, and motorcycles. (Note: Do not use under AC voltage.) Package includes:1 Electric Circuit Tester Kit (1x Power Scan, 1x Probe Tip, 1x Auxiliary Ground Clamp, 2 x Clips, 1x 13ft Test Lead) & 1 User Manual. Quick Probe. The power circuit probe tester uses advanced high-sensitivity probes to provide you with fast and accurate detection. Package includes: Electric Circuit Tester Kit x1 User Manual x1 Excellent Electric Circuit Finder Voltage testing range: 6-24V DC When the probe touches the positive electrode ( ), the LED light should be RED. When the probe touches the negative electrode (-), the LED light should be GREEN. Easily test & check whether the component is defective or whether the rated current of the component is higher than the tester. Good grounding: Green, Poor grounding: Red. Continuous state: Green, Open circuit state: none. Overload protection: 7A. Once the current exceeds 7A, this item will disconnect the current automatically and make out a buzzer sound. High-sensitivity Probe Use Premium high-sensitivity probes to provide you with fast and accurate detection. LED Indicator & Power Switch Simple Indicator and switch help you easily find out the automotive electrical system problems and save your time. 13Ft Detection Lead Come with 13Ft cables, allow you to test the entire vehicle circuit system. Ground Clamp We can consider it as a long jumper test lead by leaving the right clip disconnected from the battery.