1. High Precision Detection: Accurately detects issues in car circuits to ensure vehicle safety and reliability. 2. Convenient to Carry: The car truck circuit test pen is lightweight and portable design allows for circuit testing anytime, anywhere. 3. Digital Display: With digital display technology to visually show circuit status, making it easy to operate. 4. Durable Materials: Made with quality materials for durability and reliability, compatible with 3V, 6V, 12V, and 24V circuits, ensuring long term use without easy damage. 5. Multifunctional: The car circuit tester pen is suitable for automotive fuse testing, generator testing, voltage frequency testing, and circuit polarity identification. Specification: Item Type: Car Truck Circuit Test Pen Material: ABS Applicable: 3V, 6V, 12V, 24V universal fit Function: Car fuse test, generator test, electric frequency voltage test, circuit positive and negative pole resolution Package List: 1 xCar Truck Circuit Test Pen