- Long Battery Life: Powered by two AAA 1.5V batteries, this pen provides over 10 hours of continuous use. - Portable and Lightweight: Compact pen holder design makes the tool easy to carry and use for measurements anywhere. - Clear Led Display: The LED indicators show the magnetic field polarity, with red for N pole and green for S pole, making interpretation straightforward. - High Sensitivity and Accuracy: A sensitive probe and high-performance chip deliver precise and reliable measurements. - Practical Applications: - On site motor, generator, or magnet installation and maintenance to verify polarity and orientation. - Electronics assembly or repair to confirm magnet orientation in components. - Educational demonstrations or lab experiments to map and illustrate magnetic field direction around magnets or coils.