PWM DC Motor Speed Controller Switch DC 20A Current Voltage Regulator 10-60V PWM High Power Drive Module 60A 12 V 24 V 36 V 48 V
 
Specifications:
Operating voltage: DC 10V-60V
Output Current: 0 to 20A.
Frequency: 25KHz.
Continuous power: Max 1200W
Speed range: Motor zero speed to maximum motor speed
The maximum current up to 20A radiator or heat required to increase the fan
Material: Plastic, metal
Size (L*W*H): 76mm*44mm*26mm

Package Included:
1 x  20A Universal DC10-60V PWM HHO RC Motor Speed Regulator Controller Swit

Note:
1. This governor is used for brushed DC motors.
2. It is not suitable for speed regulation of brushless DC motors; nor can it be used as a voltage regulator or voltage stabilizer!
3.Make sure that the positive and negative connections are correct before powering on, and the wiring should not touch the heat sink, which may burn the circuit board.
4.Note that this is not a power supply module, and the motor must be connected to adjust the speed. If the motor is not connected, the output of the multimeter will not change.