Feature: The speed control range of the motor governor is 901400 r/min at 50 Hz and 901700 r/min at 60 Hz. The controller is built with high-quality electronic components for stable and reliable performance. It offers high control precision, enabling precise micro-control of motor speed. The product is easy to operate, allowing users to quickly learn and master its functions. Commonly used in packaging, printing, food processing, electronics, instrumentation, medical equipment, and garment industry production lines as a speed drive device. Specification: Product model: US-52-RED Compatible motor power: 300W, 400W, 500W (optional) Operating power supply: AC 220V, 50/60 Hz (voltage fluctuation range 10% Ue) Operating environment temperature: -10C to 50C Relative humidity: 90% (non-condensing)