This Car Circuit Tester Pen is a versatile tool designed for testing electrical systems in vehicles. With features such as continuity testing, digital display, and relay & component testing, it provides accurate and reliable results. The compact design and included probes make it easy to use and perfect for on-the-go troubleshooting. Made in China, this tester is compatible with 6V, 12V, and 24V DC voltage systems, making it a must-have for any garage or workshop.