The PWM is an adjustable way of changing the voltage of the two ends of the load through controlling the DC power switching frequency of the steady voltage to meet the demand of controlling some certain voltage, which has extensive use, such as, motor speed regulation, temperature controlling, pressure controlling and so on.

Features:
Power requirement:10-50V DC
Rated current: 40A(Maximum output current)
Frequency : 12000HZ
Control Motor Power : 0.01-2000W,
12V:480W(max),24V:960W(max)
36V:1440W(max),50V:2000W(max)
Regulation range:5-100%
PCB Size:90x51mm(inch:3.5"x2")
Case size:105x55x40mm(inch:4"x2.2"x1.6")
The operation environment temperature: -20 degrees to 40 degrees

Specification:
Package weight: 130g
Color: the outside cover is black, and the inside combines the green and white
PCB Size: 90x51mm (inch: 3.5"x2")
Case size: 105x55x40mm (inch: 4"x2.2"x1.6")

How to use:
Connect your motor (or DC load) to the motor terminals as indicated on the writing diagram.
Connect a voltage of 10 to 50V DC to the circuit making sure of the correct polarity of the connection. Note that the voltage applied to the circuit. It is recommended to add an appropriately rated fuse inline with the positive supply in order to protect the circuit from any possible short circuits
You can now control the speed of the motor through potentiometer

What is included:
1 x 10-50V 40A DC Motor Speed Control PWM HHO RC Controller
1 x User manual