Features: Speed Control Knob: This knob can adjust motor speed and display in real time. There are 5 controllers in different power and you can choose the one you need. It has compact size, high precision, wide speed controlling range, and long service life. Built-in capacitor, supporting CW/CCW rotation. Widely used in packaging, printing, food, electronics, instruments, medical equipment, clothing industry production line for speed drive device. Connect COM and CW, the motor rotates in forward direction connect COM and CCW, the motor rotates in reverse direction. Specification: Model: UX-52 Input Voltage: AC 220V 50Hz Optional Power: 15W, 60W, 120W, 250W, 400W Output Speed: 0-1450rpm Speed Adjustable Range: 0-1450rpm Operation Mode: Manual Precision Speed Change Rate: 2% Steady Speed Precision: 10 Port: Pin Size: Approx. 10*10cm/3.9*3.9inch Weight: Approx. 322g / 11.4oz Package List: 1 x Motor Speed Controller