Description :
12V 24V 20A Max PWM DC Motor Stepless Adjustable Speed Controller 25kHz
 Features :
Suitable for the DC motor (or DC load) within 20A.
It with metal shell and connective label, very easy to install and use.
Potentiometer with adjust speed swtich function, and button swtich function.
 Specification :
Input supply voltage: DC 9V to 60V
Max current: 20A
Sustained current: 18A
PWM frequency: 25KHz
Adjustable speed range: 0%-100%
Speed adjustment way: Potentiometer
Output voltage: Linear under load
Speed control type: Basins
Size(LxWxH): 90 x 50 x 35 mm
Cable Length: 130 mm

Operating instruction:
Before you attempting to wire the controller, make sure power is off.
WARNING:
DO NOT REVERSE POSTIVE AND NEGATIVE POWER LOADS.THIS WILL DAMAGE THE CONTROLLER.
TO CHANGE MOTOR DIRECTION, INTERCHANGE THE POSITIVE AND NEGATIVE WIRES OF MOTOR.
1.Connect wires refer to the "wiring diagram"
2.Turn on the power.
3.Adjust the potentiometer.

Connection mode:
Red Line: Power +       Black Line: Power -
Blue Line: Motor+        Green Line: Motor -
 Package includeds :
1 x DC Motor Speed Controller with metal shell
 Details pictures :