Features: High precise magnetic identifier delivers accurate polarity detection for generators, motors, with ±2% measurement accuracy, ensuring proper equipment alignment through its advanced magnetic field detector technology. Featuring a compact, portable design with ABS plastic housing and LED indicators, this magnetic tester enables single touch operations for recognition without complex calibration. Ideal for engineers, technicians, and DIYer enthusiasts working with electromagnetic devices, this portable magnetic tester serves professional in electrical maintenance, manufacturing, and electronics repair industries. Perfect for on site testing in workshops, laboratories, or industrial facilities to verify magnet orientations in speakers, sensors, motors, using its handheld magnetic field detector functionality. Built to withstand daily use across multiple applications, this lightweight magnetic identifier tool combines laboratory grade precise with portability for reliabled magnetic materials analysis in both commercial and household environments. Specifications: Component: ABS Size: approximately 156x22x20mm/6.14x0.86x0.78inch Sensitivity: ±5mT (50Gs) Operating temperature: -20°C to +80°C Storage temperature: -40°C to +150°C Package Includes: 1pcs Magnetic Field Detecting Pen(battery not included) 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 color. Thanks for your understandings.