DC 9-60V PWM Motor Stepless Variable Speed Controller Reversible SwitchFeature: 1: Potentiometer with adjust speed switch function,and button switch function2: The item with metal shell and connective label,very easy to install and use3: DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM)4: Change motor direction, interchange the positive and negative wires of motorSpecifics:Condition: 100% Brand NewInput supply voltage: 9V - 60V DC(max)Adjustable speed range: 0% - 100%PWM frequency: 25kHzContinuous current: 18AMax current: 20ASize: 92 x 52 x 36mm/3.6 x 2 x 1.4 inchesHole distance: 104mm/4 inchesWeight : Approx 155gApplication: Suitable for the DC motor (or DC load) within 20ANote:1. Before you attempting to wire the controller, make sure power is off2. Electric vehicle motors cannot be used.3. The input voltage should be equal to the rated voltage of the motor, not 220V AC4. The input voltage must be divided into positive and negative. The red wire is the power supply positive, the black wire is the power supply negative, and the blue and green motors are both positive and negative.Package Included:1x Motor Speed ControllerWarranty:Returns: Customers have the right to apply for a return within 60 days after the receipt of the product24-Hour Expert Online: Solve your installation and product problems