Features: The speed board is protecting by power voltages reverse connection. When the input voltages is reversed, the speed board do not work and is safe to use Speed board with motor slow start function, in 2seconds uniform increase motor current to normal value; It can avoid the risk of very large current when the motor starts, sudden acceleration of the motor, damage to the motor load equipment, speed regulating board, power supply and so on Wide ranges of applications, suitable for a variety of industrial DIY occasion Applicable motor power ranges: within 5V60W, within 6V70W, within 9V110W, within 12V150W, within 15V180W, within 18V200W PWM output ranges: 0%-100%, the motor can be fully mediated and the highest speed operation The speed board can be connecting to the external PWM signal of about 5V10KHZ or 0-5V voltages speed regulation, that is to say, it can be connecting to PLC speed regulation Specifications: Component:Plastic Size:Approx.61x41x15mm/2.4x1.61x0.59inch Voltages Ranges:Dc5V-18V Frequency: 13kz Rate Current:12A, Short Term:15A Package Includes: 1pc Motor Speed Controller Board note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.