- Auto Truck Circuit Test Pen : This professional car circuit tester is designed for accurate circuit testing from 5V to 90V. The light indicator on the handle illuminates when a circuit connection is established, providing clear feedback for your testing needs. Compact and lightweight, it is easy to carry for on-the-go use. - Durable Material : Features a stainless steel probe to access hard-to-reach areas. The test light body is constructed from high-quality ABS, making it shatterproof and more durable compared to standard test lights, ensuring longevity in tough environments. - Safety Features : Equipped with sturdy copper clips and an insulated protective cover for a secure grip on the body and screws. Enhanced insulation protects users from electric shock, and the circuit board includes wiring protection to prevent accidents. - User-Friendly Design : The flexible PU spring steel wire offers better durability and ease of use, making it lighter than ordinary steel wire. The design includes large alligator clips for simple one-handed operation, promoting efficiency during testing. - Practical Applications : Ideal for automotive technicians conducting diagnostics, DIY enthusiasts troubleshooting electrical systems, and professionals performing routine maintenance on vehicles. The versatility and ease of use make it an essential tool for circuit testing in various settings.