Please note that this controller has a low frequency causing some types of the motor to whine at low speeds but not all motors will be like this
Specifications: 1. Net weight: 70g 2. Size: 74 * 47 * 28ïˆmmï‰ 3. Model: RRCCM2SPC Main technical parameters: 1.Working Voltage: DC 10V - DC 30V 2.Maximum power: 120W 3.Rated Current: 3A 4.Max Current: 4A 5.Maximum continuous output current:3A ;Overload short circuit protection current:4A ,short circuit time does not exceed 30 seconds 6.PWM Frequency: 500 KHz 7.PWM pulse width modulation range: 5% -95% 8.Motor Type:Brush What's in box: 1 x RioRand Adjustable DC Motor Speed Controller Attention: 1.Pls do not connect AC power directly(Such as:110V AC),the input volt of this controller should be DC,otherwise it will be burned out 2.Positive and negative pole of the POWER can not be reversed 3.Positive and negative pole of the MOTOR can be reversed.When the direction of operation is inconsistent with your expectations,you can change the direction by adjusting the order of the line 4.Adjust the potentiometer knob to change output duty cycle