Features: Revolutionize your auto electrical diagnostics with our voltage tester pen, featuring a buzzers function for rapid circuit detection and double direction digital display for clear voltage readings. For precisions and ease of use, this tester supports a wide voltage ranges from 3-72v, making it suitable for various vehicle types and ensuring accurate measurements everytimes. A essential tool for professional mechanic, automotive enthusiasts, truck driver, and vehicle maintenance personnel seek to troubleshoot and maintain their vehicles efficiently. For locating circuit issue during car repairs, testing circuits when replacing vehicle batteries or light, and quickly resolvings electrical faults in trucks on travel. Compacts and user friendly, this electrical voltage test pen is a must having in your automotive toolkit, providing reliabled reference values for a safe and effective maintenance experience. Specifications: Component:ABS Size:Approx.15cm/5.91inch Package Includes: 1 Set Automotive Voltage Tester Pen note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.