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Automotive Test Light with 5-120V LED Digital Voltage Display, Circuit Tester Automotive with Voltmeter & Dual Color Polarity Indicator, Electrical Test Pen with Long Probe for Car RV Fuse Checker Yigiao The power adapter have overheatBrand: WINAMOO Features: EXPANDED VOLTAGE CAPACITY & EXTENSIVE USEWINAMOO electrical tester features a wider testing range of 5V 120V, quickly tests car battery voltage and diagnoses issues, including alternator tester functionality for car truck SUV boat charging systems. Also to inspect circuit tester integrity of headlights, taillights, fuse connections and more. CLEAR DIGITAL DISPLAY & PRECISE READOUTSBright LED display shows highly clear readings