- Durable Construction: Crafted with a high-strength steel probe for reliable wire piercing while inspecting electrical circuits. The extended probe and oversized alligator clip make it easy to access tight spots. - Versatile Tester: This probe pen is ideal for checking electrical circuits, including automotive headlights, taillights, turn signals, faulty sockets, and fuse connections in various low-voltage vehicles. - Effective Circuit Testing: The LED indicator brightly lights up when the circuit is functioning properly. Additionally, the polarity indicator provides clear visual cues: green for positive polarity and red for negative. - Anti-Lost Design: Engineered with a protective probe cover that integrates seamlessly, ensuring your probe pen stays secure and is easy to transport, making it ready for any situation. Use Scenarios: 1. Quickly diagnose a malfunctioning taillight in your car, saving time and potential repair costs. 2. Easily test the functionality of fuses in your vehicle's electrical system during routine maintenance. 3. Inspect complex wiring in hard-to-reach areas, like under the dashboard, with confidence and precision. Enhance your electrical testing efficiency with this reliable tool designed for both professionals and DIY enthusiasts. Make sure your electrical systems are safe and operable with this essential probe pen.