The input voltage should be equal to the rated voltage of the motor (within 5-36V). The motor line is not in any order. This speed controller switch is for 3-Phase brushless motor, and support motor CW CCW Stable performance, simple and most cost-effective multi-function operation. The speed of the motor can be regulated by the potentiometer, easy to use. With wide voltage range, DC5-36v, and protective current is 15A. Small size and elegant appearance. Output current:within 15A Forward and reverse rotation:two-way Protection current:15A Input current:larger than the working current of the motor Speed regulation mode:potentiometer (270 degrees linear) Speed range:0-100% Support motor:brushless motor Wiring Type:Barrier Terminal Block Knob specification:100K (with switch) Colour: Material:PC+Metal Package Contents: 1 * Frequency converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.