Features: brand new and high quality Using high-quality electronic circuits and integrated components, long service life. It has the advantages of small size, high accuracy, wide speed range, low energy consumption, and convenient use. It is widely used in production equipment of packaging, printing, jewelry electronics, instrumentation, clothing machinery and other industries. This product can be used for speed control of YYDJ, YCJT, YTCJ, YCJFK and other series of motors. When using, please adjust the external speed to "0" first, so as not to generate instantaneous large current and cause permanent damage to the control. Specifications: Material: ABS+Metal Weight: 900g Size: 102x60mm/4.01x2.36inch Rated Power: 6W-40w Power Frequency: 50hz Input Voltage: 110v~220v Package Includes: 1x Motor Speed Controller 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.