Features 1、【Multi-functional Circuit Diagnosis】: Integrates short-circuit testing, open-circuit detection, wire tracking, and other multi-functions in one, effectively identifies circuit problems, accelerate the automotive troubleshooting and repairing process, and enhances maintenance efficiency. With illumination function, applicable to a variety of complex maintenance environments. 2、【LCD Backlit Display】: The backlit LCD display guarantees easy reading even in low light conditions, while real-time voltage measurements are accompanied by audible beeps, ensuring an intuitive and immediate understanding of test results. 3、【Humanized Design】: The soft rubber handle offers a comfortable, anti-slip grip designed for prolonged use and durability. It comes equipped with a versatile 3.6-meter flexible, retractable cable, significantly expanding the scope of testing. An anti-loss probe protecting sleeve and a robust, large-sized alligator clip are thoughtfully integrated to enhance operational safety while enhancing the tool/u0027s overall functionality and practicality. 4、【Bi-polarity Test Function】: The bi-polarity test function utilizes distinct red and green LEDs, providing an instant and intuitive differentiation between positive and negative poles, which ensures quick and error-free polarity testing. 5、【Wide Applications】: The digital display automotive tester boasts a versatile operating voltage ranges from 4VDC to 75VDC, making it universally compatible with all vehicle electrical systems within 6/12/24/48V. It is an indispensable professional tool for automobile repairs and maintenance. Specification This car test pen integrates short-circuit testing, open-circuit detection, wire tracking, and other multi-functions in one, effectively identifies circuit problems, accelerate the automotive troubleshooting and repairing process, and enhances maintenance efficiency. With illumination function and bi-polarity test functions. With versatile operating voltage ranges from 4VDC to 75VDC, making it universally compatible with all vehicle electrical systems within 6/12/24/48V. It is an indispensable professional tool for automobile repairs and maintenance. Features: 【Multi-functional Circuit Diagnosis】: Integrates short-circuit testing, open-circuit detection, wire tracking, and other multi-functions in one, effectively identifies circuit problems, accelerate the automotive troubleshooting and repairing process, and enhances maintenance efficiency. With illumination function, applicable to a variety of complex maintenance environments. 【LCD Backlit Display】: The backlit LCD display guarantees easy reading even in low light conditions, while real-time voltage measurements are accompanied by audible beeps, ensuring an intuitive and immediate understanding of test results. 【Humanized Design】: The soft rubber handle offers a comfortable, anti-slip grip designed for prolonged use and durability. It comes equipped with a versatile 3.6-meter flexible, retractable cable, significantly expanding the scope of testing. An anti-loss probe protecting sleeve and a robust, large-sized alligator clip are thoughtfully integrated to enhance operational safety while enhancing the tool's overall functionality and practicality. 【Bi-polarity Test Function】: The bi-polarity test function utilizes distinct red and green LEDs, providing an instant and intuitive differentiation between positive and negative poles, which ensures quick and error-free polarity testing. 【Wide Applications】: The digital display automotive tester boasts a versatile operating voltage ranges from 4VDC to 75VDC, making it universally compatible with all vehicle electrical systems within 6/12/24/48V. It is an indispensable professional tool for automobile repairs and maintenance. Specifications: Name: Test Pen Material: plastics Voltage ranges: 4-75VDC Resolution: 0.1V Accuracy: 4-75V (1%+3digits) Operating temperature: 0-50℃ Operating humidity: <80% Package size: 287 * 73 * 45mm / 11.30 * 2.87 * 1.77in Package weight: 214g / 7.55ounce Packing List: 1 * Test Pen Package List 1 * Test Pen