Features Wide Voltage Range: Operates efficiently between DC4.5V and 35V, accommodating various projects with a powerful output of 90W for versatile applications Forward and Reverse Control: Easily switch the motor's direction by adjusting the line sequence, ensuring optimal performance for your specific needs Precision Speed Adjustment: Use the potentiometer knob to ly control the duty cycle, allowing for fine-tuned speed regulation of motors and fans Features: 1、BASIC SPCIFICATIONS: The working wide voltage of the motor speed controller is DC4.5V‑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. Specification: Item Type: PWM Motor Speed Controller Working Voltage: DC4.5V-35V Output Current: 0-5A Output Power: 90W (Large) Quiescent Current: 7uA (Standby State) PWM Duty Cycle: 1%-100% PWM Frequency: 20khz Size: Approx. 30mm Length x 26mm Width (Without Handle) x 14mm Height / 1.18in Length x 1.02in Width x 0.55in Height Package List: 1 x DC Motor Speed Regulator 1 x Knob Caps 2 x Washer Note: betweendiv>1. The input of the DC motor speed controller is DC and cannot be directly connected to AC (For example: 220V AC on the front page), otherwise will burn!between/div>betweendiv>2. The positive and negative terminals of the DC power supply are not reversed, otherwise the governor may be damaged.between/div>betweendiv>3. The motor can be positive or negative. When the operating direction does not match the expectation, the line sequence can be adjusted to change the direction.between/div>betweendiv>4. Adjust the potentiometer knob to change the duty cycle of the governor output, and the motor speed changes.between/div> Package List 1 x DC Motor Speed Regulator 1 x Knob Caps 2 x Washer