- The auto car voltage circuit tester pen is an essential tool designed for accurate detection of 6V, 12V, and 24V voltages, helping you pinpoint electrical issues in your vehicle swiftly. - Featuring an intuitive design, this probe test tool simplifies the process of checking voltages across various car circuits. It delivers reliable measurements that save you time and enhance your repair efficiency. - Ideal for both mechanics and DIY car enthusiasts, this voltage circuit tester pen provides precise voltage readings, ensuring that your vehicle's electrical systems operate correctly. - Use it to troubleshoot a range of electrical problems, such as a failing battery, malfunctioning alternator, or other components. Its accuracy makes it a vital tool in addressing automotive electrical concerns. - Compact and portable, this tester pen is easy to carry. Take it with you wherever you go, ensuring you are always prepared to diagnose and rectify electrical issues in your car on the spot. - Material quality and performance are paramount; this tester is built for durability, ensuring consistent results over time in various automotive environments.