Item Type: Motor Speed Controller Material: Metal 1Smart Control: Supports reverse connection, the motor speed controller enables better control on CW and CCW rotation. 2Easy for Work: Just press the switch and rotate the knob, the AC regulator ensures easy operation and high efficiency. 3Simple Wiring: The black line is the main capacitance line, the red line and white line are the secondary capacitance lines, the two blue lines are speed regulation feedback, and the green line is the ground wire. 4Good Material: Adopting premium metal material with a sturdy structure, has excellent durability for long term using. 5Fast to Install: Comes with a compact size and a light weight as well, the easy installation can be quickly completed.1 x Motor Speed Controller