Liquid crystal display frequency and duty , shutdown and output, clear and clear at a Using digital encoder to set frequency and duty , digi- adjustment, convenient and fast, high precision and strong reliability.Dual mode, the duty step is 0.1% in fine mode.Using 2 low internal resistance MOS tubes and -drivers, the performance is better and more stable, and it supports high current and high frequency.The upper and lower limits of the working frequency and duty can be set, which is convenient for users to opera- te and use according to the working characteristics of their own motors or LEDs.Setting the lower limit avoids the situation where there are numerical values, the motor does not turn or the light does not , and setting the upper limit avoids the situation where the motor is too fast or the light is too .Colour:Photo ColorMaterial:plasticPackage Contents:1 x motor speed controllerOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.