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,convenient to use.Widely used ingear motor, packaging, printing, food, electronics, instruments, medical equipment, clothing industry production line for speed drive device.Specification:Model: UX-52Input Voltage: AC 220V 50HzOptional Power: 15W, 60W, 120W, 250W, 400WOutput Speed: 0-1450rpmSpeed Adjustable Range: 0-1450rpmOperation Mode: Manual PrecisionSpeed Change Rate: 2%Steady Speed Precision: 10Port: PinSize: Approx. 10.2*10cm/3.9*3.9inchWeight: Approx. 334g / 11.8ozPackage List:1 x Motor Speed Controller