1. DC3V-72V wide voltage test range, digital display for clear readings, ideal for vehicle DC circuit inspection. 2. Bidirectional polarity detection, red-green LED lights plus buzzer with different beep tones to identify positive / negative polarity. 3. Built?in front LED work light, great for repairing in dark engine bays and tight wiring spaces. 4. Retractable coiled cord with alligator clip, fine sharp probe for accessing narrow terminals. 5. Professional automotive circuit tester, safe for vehicle ECU, perfect for car & motorcycle wiring troubleshooting.
