Feature: 1. Versatile Functionality: The automotive electrical system diagnostic tool supports component activation, voltage detection, diode testing, continuity testing, ground detection, short circuit tracking, and positive/negative polarity detection. With its wide ranges of functions, it is a highly practical tool for automotive professionals. 2. Clear LCD Display: Featuring a high-clear LCD screen, it provides clear and easy-to-read data. The backlit display ensures visibility in various testing environments. Additionally, the built-in illumination light enables convenient usage during nighttime repairs. 3. LED Indicator Lights: Equipped with LED indicator lights, it allows for quick and easy identification of positive and negative polarities. When the probe detects a positive polarity or performs forward activation, the red LED light illuminates. Similarly, when a negative polarity or reverse activation is detected, the green LED light lights up. 4. Premium Quality: Designed with a high-quality ABS housing, the circuit probe tester boasts nice durability and resistance to aging. Its ergonomic design ensures comfortable handling. The premium metal probe is corrosion-resistant and offers superb conductivity. 5. Wide Compatibility: It is suitable for testing all 3.5V-36V electrical systems, including car, truck, SUV, motorcycle, construction vehicle, and boat. It can directly connect to the car battery for power supply. With its broad application ranges, it is an indispensable tool for automotive professionals. Specification: Color: Blue Material: ABS Overcurrent Protecting Current: 8A DC Voltage Ranges: DC 6-24V Rated Current: 1-8Amp Accuracy: ±2% Working Temperature: -10~60℃ Cable Length: 4.5m/ 14.8ft Item Size: 260 * 40 * 28mm/ 10.2 * 1.6 * 1.1in Package Size: 280 * 132 * 50mm/ 11.0 * 5.2 * 2.0in Package Weight: 390g/ 13.8oz . Package List: 1 * Car Circuit Tester 1 * Manual