- High-brightness bulbs paired with a transparent observation window ensure test results are easy to see, enhancing accuracy during diagnostics. - Simple to use: When the engine is running, position the end of the test pen on the high-voltage line. The luminous tube will clearly indicate ignition performance, allowing for quick assessments. - Portable and cable-free design makes it an essential tool for automotive inspection and maintenance, providing convenience and ease of use in various settings. - The grooved end increases contact area between the wire and instrument, resulting in more precise test results and reliable performance. Applications: - Ideal for technicians performing engine diagnostics, allowing for immediate visibility of ignition performance without complicated setups. - Perfect for DIY car enthusiasts who want to quickly assess their vehicle's ignition system during routine maintenance. - Useful in roadside emergencies, helping mechanics diagnose ignition issues efficiently without needing extensive equipment. This tool is compatible with most vehicle types, ensuring versatility across different automotive applications. Its compact size allows for easy storage in toolkits or glove compartments, making it a must-have for anyone involved in vehicle maintenance.