Features: Speed Control Knob: This knob can adjust motor speed and display in real time. There are 16 controllers in different types, you can choose the one you need. You can accelerate or decelerate motor slowly with this speed control unit. Built-in operating capacitor, convenient to use. Main wire: Black; Capacitor wire: Red, White; Feedback wire: Blue, Yellow; Earth wire: Green. Specification: Input Voltage: AC 220V Speed Adjustable Range: 0-100% Optional Type: 6W Single Row 6 Pin 15W Single Row 6 Pin 25W Single Row 6 Pin 40W Single Row 6 Pin 60W Single Row 6 Pin 90W Single Row 6 Pin 120W Single Row 6 Pin 200W Single Row 6 Pin 6W Double Row A Port 15W Double Row A Port 25W Double Row A Port 40W Double Row A Port 60W Double Row A Port 90W Double Row A Port 120W Double Row A Port 200W Double Row A Port Size: Approx. 10*10*5cm/3.9*3.9*2inch Weight: Approx. 327g / 11.5oz Package List: 1 x Motor Speed Controller Note: Do NOT plug or unplug when power on.