Feature:1. Speed control knob rotates fluently and frictionless.2. Speed regulation is accurate and error free.3. Small size, light weight and easy to install.4. Adopts PWM speed regulation mode which is more accurate and less affected by noise.5. Wide range of input voltage from 10-60V.Specification:Item Type:DC Motor RegulatorMaterial:BrassModel:CCM96SKPower Supply Mode:DCRated Current:10AMaximum Current:20ASpeed Range:5-100 percent PWM Frequency:25KhzPotentiometer:Resistance B100KHole Size:8mm or 0.31inPackage List:1 x Speed ControllerNote:1. DC motor governor input is DC, unable to directly connected to AC (such as: household AC) or it will burn out2. The positive and negative poles of the DC power supply cannot be reversed, otherwise the governor will be damaged.3. The motor can be positive or negative, when the running direction is inconsistent with the expectation. The direction can be changed by the line adjustment sequence.4. The potentiometer knob can change the governor output duty cycle to change the motor speed.5. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.