Features 1、Speed Control Knob: This knob can adjust motor speed and display in real time 2、There are 5 controllers in different power and you can choose the one you need 3、It has compact size, high precision, wide speed controlling range, and long service life 4、Built-in capacitor, convenient to use 5、Widely used in gear motor, packaging, printing, food, electronics, instruments, medical equipment, clothing industry production line for speed drive device Specification 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 in gear motor, packaging, printing, food, electronics, instruments, medical equipment, clothing industry production line for speed drive device. Specification: Model: UX-52 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. 10.2*10cm/3.9*3.9inch Weight: Approx. 334g / 11.8oz Package List: 1 x Motor Speed Controller Package List