Features:1. With CW or CCW switch, potentiometer knob with switch, you can use PLC to control2. Fine workmanship and it has stable performance.3. Fast speed and high efficiency.4. Small size, easy to carry and convenient to install5. Made of high quality, durable and long service life.Specification:Condition: 100 percent Brand newItem Type: PWM DC Motor Speed ControllerInput Voltage: DC10-55V(equal to the rated voltage of the motor)Output Voltage: linear under loadMaximum Current: 80AContinuous Current: 40A (use for a long time to pay attention to heat dissipation or reduce current)Speed Control Type: Current-adjustingSpeed Control Mode: Potentiometer (linear)Support Motor: DC brush motorCW or CCW: supportSpeed Range: 0 - 100 percent Control Frequency: 15KHZWiring Type: terminalKnob Specification: 100K (with switch)Wiring Type: Fence terminal blockSize: Approx. 100 x 76 x 28mm or 3.9 x 3 x 1.1inPackage List:1 x PWM DC Motor Speed Controller1 x Knob Cap1 x Gasket1 x NutNote:1. The digital display is the motor full speed percentage 0-100 non-motor actual speed2. The input voltage must be positive and negative3. The input voltage is equal to the rated voltage of the motor within 10-55V DC.4. 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..