1.The input must be divided into positive negative poles (do not reverse it) 2.The input voltage should be equal to the rated voltage of the motor (DC5 to 36V). 3.DO NOT INPUT AC220V or burn down directly 4.The PWM controller must be loaded with equipment in order to work properly. Please do not test without load. Color: green, silver material: plastic Input vol: DC5-36V (Equal to the rated voltage of the motor ) Speed adjust range: 0-100% overload protection :15A Forward reverse: YES Speed regulation mode : 270 degrees of linear potentiometers (with switch) Applicable motor :DC three-phase brushless motor OutPut current:15A MAX POWER=12V x 15A=180W Package Contents:3 x Brushless motor controller 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.