1Good Control: The speed adjustment range of this motor speed controller is 903000r/min, which ensures better control. 2Easy Setting: You can set the set display ratio, automatic conversion and display target value according to your need. 3Safe Working: Locked rotor protection function will prevent motor and speed controller to be burn out from stalling. 4Well Display: Digital display together with clear panel enables convenient operation with stability and reliability. 5Simple to Install: Suitable for YT series motors, the built in speed regulator is easy to install with light weight. Item Type: Motor Speed Controller Product Material: ABS Product Model: SK-200E Installation Method: Built In Voltage: Single Phase 220V Applicable Motor Type: YT series speed adjustable motor.Running Capacitor: External (placed in the package of the speed regulating motor and needs to be connected by the user) Speed Range: 90-3000r/min Ambient Temperature: -10~45 1 xMotor Speed Controller1. Do not use in places with flammable or corrosive gases. 2. Avoid continuous vibration and excessive shock.3. The temperature of the motor casing can exceed 70 (depending on the operating condition). If the motor is accessible during operation, please attach warning label to make it clearly visible. 4. Please connect the ground terminal to the ground point of the equipment.5. Installation, connection and inspection must be carried out by qualified installers.