Features: Experience precise motor control with our Motor Speed Controller, featuring a digital display and 40A capacity, perfect for managing the speed of your brushed motors. This controller includes a forward reverse switches and potentiometer knob with a integrated switches, allowing for PLC control for operations. For electronic engineers, DIY enthusiasts, and industrial equipment maintenance personnel seek reliable and adjustable motor speed solution. Perfect for use in industrial automation equipment, model making, and any application requiring precise speed adjustments. Ensure correct polarity before powering up; this unit is not a power module and requires connection to a motor for speed adjustment. Specifications: Material: Plastic Input: DC10-55V Current: 60A Continuous Current: 40A (pay attention to heat dissipation or reduce current when use for long time) Control Frequency: 15KHz Size: About. 10x7.6x2.8cm/3.94x2.99x1.1in Pattern: A(Without Shell)/B(With Shell) Package Includes: 1pc Motor Speed Controller note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color. The digital display is the motor full speed percentage, 0-100 is not the actual motor speed. Input voltages must be divided into positive and negative. The input voltages is DC10-55V to be equal to the rating voltages of the motor. Ensure that the positive and negative connection correct before powers on. Do not touch the heat sink, which may burn the circuit board. Note that this is not a power module, must be connecting to the motor to speed. For brushed motor.