Check the listing for details. Automotive Electrical Diagnosis System Test Light Circuit Probe Tester Tool. Condition: New. Listed at 18.99 USD. [ Polarity Testing & Continuity Testing ]: The power circuit probe tester can be used to test uncertain contact polarity in vehicles. When the it touches the positive pole, the indicator light will turn on red, and when it touches the negative pole, it will turn on green. In addition to polarity testing, the power short circuit finder can also perform continuity testing, it is mainly to test whether the circuit has continuity and whether it is short-circuited. [ How to Use ]: Clip the red clip to the positive electrode of the car battery and the black clip to the negative electrode of the car battery, press button to “Positive”side with LED lighting RED, connect the tip to positive terminal of tested component to active the component. If LED turns to GREEN with buzzer, stop testing and check the component if defective or not, or rating current of component is higher than that of this tester. Specification: · Operation voltage: 6-24V DC · Cable length: about 4 m · Overload protection: 7A (When the current exceeds 7A, this item will disconnect the current automatically.) · Weight: about 200 g · Material Type: plastic and stainless · Item Length: 225 mm/ 8.85 inch · Lead Length: approximately 4 M/ 157.5 inch · Item Width: 30 mm/ 1.18 inch Package List: 1 X Power Scan 1 x Probe Tip 1 x Battery Hookup Clips 1 x User ManualOn Aug 7, 2023 at 20:22:22 PDT, seller added the following information: