- Function and compatibility: This test pen is specially developed for vehicle maintenance. It is a practical tool for diagnosing electrical problems in cars and works as a voltage meter tester and a responsive electrical test pen. - Bright LEDs for visibility: High brightness LED indicators provide clear readings in low light conditions, making on-vehicle testing easier and more reliable. - Clear, quick readings: The highly visible LEDs ensure easy interpretation of circuit status and it functions as a current tester when needed. - Versatile car repair tool: Ideal for vehicle maintenance, it is indispensable for diagnosing and fixing electrical problems in cars and serves as a circuit tester and general tester. - Practical use scenarios: - Use during routine vehicle maintenance to test wiring, sensors, and electrical circuits. - Check battery voltage and ignition circuit status during starting diagnostics. - Verify wiring continuity during repairs or after electrical installations.