Function: 1. Utilizes PWM speed regulation technology for high conversion efficiency, a wide speed regulation range, and stable performance. 2. Employs imported semiconductor chips, tested for voltage, current, and function, ensuring a stable and reliable circuit. 3. Features a potentiometer for forward, reverse, and stop control, allowing for acceleration and deceleration. 4. Safe to use with overload and short-circuit protection to safeguard the motor and extend its lifespan. 5. Offers a wide speed range from 5% to 95%, with a PWM frequency of 500Hz and a potentiometer resistance value of B10K. Specification: Item Type: DC Motor Speed Controller Material: Printed Circuit Board Purpose: For DC motor speed adjustment Model: CCM2 Working Voltage: DC10V-30V Control Power: 12V x 3A = 36W, 24V x 3A = 72W, Above 24A, Max 120W Rated Current: 3A Maximum Current: 4A Speed Adjustment Range: 5%-95% PWM Frequency: 500Hz Potentiometer: Resistance value B10K Cable Length: Approx. 20 cm / 7.9 inches Output Voltage: Approx. 0-100% of input voltage Product Size: Approx. 74 x 47 x 28 mm / 2.9 x 1.9 x 1.1 inches. Package List: 1 x DC Motor Speed Controller 1 x Power Switch 1 x Knob 1 x Nut 1 x Washer Note: 1. The input for the DC motor speed controller is DC and cannot be directly connected to AC power (like a household 220V AC motor), as this will cause damage. 2. The positive and negative poles of the DC power supply cannot be reversed, otherwise the controller will be damaged. 3. The motor's polarity can be reversed. If the running direction is incorrect, you can change it by adjusting the wire sequence. 4. The potentiometer knob can change the duty cycle of the controller's output, thereby changing the motor speed.