1、BASIC SPCIFICATIONS: The working wide voltage of the motor speed controller is DC5V‑35V, and the output power is 90W. 2、FORWARD AND REVERSE: The motor can be forward and reverse. When the operating direction does not match the expectation, you can adjust the line sequence to change the direction. 3、POTENTIOMETER KNOB: Adjust the potentiometer knob to change the duty cycle of the governor output, and the motor speed will also change. 4、APPLICATION: This is a motor speed regulator that can be used for speed regulation of DC motors, fans, etc. 5、HIGH EFFICIENCY: This is a mini DC motor speed controller with high efficiency and easy to use. 1 x DC Motor Speed Regulator1 x Knob Caps2 x Washer Item Type: PWM Motor Speed ControllerWorking Voltage: DC 4.5V-35VOutput Current: 0-5AOutput Power: 90W (Large)Quiescent Current: 7uA (Standby State)PWM Duty Cycle: 1%-100%PWM Frequency: 20khzSize: Approx. 30mm Length x 26mm Width (Without Handle) x 14mm Height / 1.18in Length x 1.02in Width x 0.55in Height