Features: 100% brand new and high quality This motor speed controller is mainly used for DC Motor speed regulation This sensor-less three-phase brush-less (BLDC) DC motor speed using high quality chips for wide voltage. Stable performance, simple and most cost-effective multi-function operation, ease of use , is a compact DC brush-less DC drives. This motor speed controller support DC motor CW and CCW rotation Specifications: Input voltage: DC5-36V Forward reversal: within 15A Input current: > motor working current Speed control: potentiometer (270 degree linear) Speed regulation range: 0-100% Support motor: brushless motor Type of connection: barrier terminal Knob specification: 100K (with switch) Module size: 10*6.8*4cm / 3.93*2.67*1.57in Weight: 141g Note: 1. The input voltage must differentiate "+" ,"-", can't input 220V voltage 2. The input voltage should be equal to the rated voltage of the motor within 5-36V 3. The motor wire ABC don't differentiate sequence