Features Over current protection: Safely control the motor speed without worrying about excessive current, ensuring long-lasting performance and preventing damage to the motor. Automatic cooling connection: After reaching a certain temperature, the motor speed controller will automatically connect, providing convenience and efficiency in operation. Wide input voltage range: The DC 1.8V-15V input voltage allows compatibility with various power sources, giving you flexibility in motor control applications. Low current consumption: With a current of less than 2A, this motor speed controller is energy-efficient, reducing power consumption and saving costs in the long run. Reliable PWM module: The built-in PWM module ensures precise and smooth motor speed control, enabling you to achieve the desired speed with ease and accuracy. Specifications: Input Voltage: DC 1.8 V-15 V  Current: Less than 2 A Size: 32 x 32 x 14 mm Package includes: 1 x Speed Controller Note: 1, Potentiometer has no switch function. 2, Connect to DC power. Never connect to 220 V AC power. 3, Please allow 1-3 mm error due to manual measurement. Thanks for your understanding. 4, Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 5, Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List