Description:OOTDTY , Features:The button is more precise than the traditional potentiometer and has a long service life (1 million times). It does not automatically generate drift. The digital display shows the value 001, 002, 003.100, which indicates the maximum engine speed. Start slowly, reach the set speed, prevent too much starting current, damage the power supply by momentary impact, damage the motor, damage the machine light and other undesirable phenomena. Using single-chip technology to adjust the speed is more smooth and smooth than traditional 555 chips, good linearity, low noise and long service life. Specifications:Item Type: Motor Speed Controller Material: ABS Shell Input Voltage: 12V-24V DC PWM Frequency: 15KHz Speed Adjustable Range: 0%-Working Current: 5A Working Current: 8A Working Capacity: 12VX5A=60W, 24VX5A=120W Measurement: 7x5x 2cm/2.76x1.97x0.79in Color: Gray Quantity: 1 PcDisplay Range 3-LED Digital Display is "000"-"100". (For example, "055" displayed, it means that the output PWM duty cycle is 55%.)Slow Start Function: After connecting the power to start, the motor will reach the speed setting slowly, not to arrive immediately. It can avoid the momentary impact of power or engine damage. Warning: No rear power positive and negative load. This will damage the controller. To change the direction of the motor, replace the positive and negative wires of the motor. No forward/reverse function. Note: Transition: 1cm=10mm=0.39 inch. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Included:1 x Motor Speed Controller