Features: 1. With CW/CCW switch, potentiometer knob with switch, you can use PLC to control 2. Fine workmanship and it has stable performance. 3. Fast speed and high efficiency. 4. Small size, easy to carry and convenient to install 5. Made of high quality, durable and long service life. Specification: Condition: 100% Brand new Item Type: PWM DC Motor Speed Controller Input Voltage: DC10-55V (equal to the rated voltage of the motor) Output Voltage: linear under load Maximum Current: 80A Continuous Current: 40A (use for a long time to pay attention to heat dissipation or reduce current) Speed Control Type: Current-adjusting Speed Control Mode: Potentiometer (linear) Support Motor: DC brush motor CW/CCW: support Speed Range: 0 - 100% Control Frequency: 15KHZ Wiring Type: terminal Knob Specification: 100K (with switch) Wiring Type: Fence terminal block Size: Approx. 100 x 76 x 28mm / 3.9 x 3 x 1.1in Package List: 1 x PWM DC Motor Speed Controller 1 x Knob Cap 1 x Gasket 1 x Nut Note: 1. The digital display is the motor full speed percentage 0-100 non-motor actual speed 2. The input voltage must be positive and negative 3. 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. .