Features: Accurately measure motor speed with this digital tachometer featuring Hall sensors technology, delivering ±0.1% accuracy for stable RPM monitoring in industrial and applications. The anti interferences design with real time LCD display ensures stable readings even in electromagnetic environments, suitable for motors up to 100,000 RPM. Ideal for mechanical engineers, robotics enthusiasts, and maintenance technicians requiring portable speed measurement solution for motors or rotating machinery. Perfect for workshop diagnostics, production line , or projects like drones motor testing and equipment calibration. Its lightweight mixing metal plastic housing combines durability with easy installation, while low power consumption extends battery life during extended field operations. Specifications: Component : plastic + metal Dimensions: about 79x43x26mm/3.11x1.7x1.02inch Display mode: 0.56 red LED, four-digit reading Measuring ranges: 10-9999 Display rate: >3 times/second Package Includes: 1xTachometer note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.