- Effortless Voltage Testing : Easily check electrical systems operating between 6-24V DC with precise accuracy, thanks to a 13.5 ft cable that enhances convenience during diagnostics. - Versatile Use : Ideal for a range of applications, this test pen allows you to verify voltage polarity, assess motor functionality, inspect lamps, evaluate conductivity, and trace short circuits, making it an essential tool for comprehensive vehicle maintenance. - Safety First : Designed with a built-in short circuit protection mechanism, this tester offers reliable performance and quickly identifies poor ground contacts, ensuring safety during frequent use. - User-Friendly Operation : Simply connect the Voltage Tester Pen to your vehicle's battery. To test straight and subtractive polarity, easily toggle the power on and off by shaking it forward or backward. Practical Scenarios : 1. Perfect for automotive technicians needing to perform quick, accurate voltage checks on vehicle electrical systems. 2. Great for DIY enthusiasts conducting routine maintenance or troubleshooting electrical issues in cars and trucks. 3. A useful tool for electricians inspecting motors and lighting systems, ensuring efficient and safe operations.