Specification: This 1803BK DC Motor Speed Controller has an input power supply voltage range of 1.8V-15VDC; maximum output power of 30W; maximum continuous output current of 2A; adjustable duty cycle from 0% to 100%; dimensions: 32x32x12mm. High-Quality Material: This PWM motor speed controller is made of high-quality circuit board material, offering good durability and heat resistance to ensure long-term service life. Input Voltage Range: This PWM speed controller for DC motors supports a wide input voltage range from 1.8V to 12VDC. The output current ranges from 0A to 2A, ensuring broad application compatibility. Safety Protection: The controller features a self-recovery fuse. If the current exceeds safe levels, the fuse automatically disconnects and resets after cooling. Wide Applications: Suitable for speed control of DC motors, fans, oxygen pumps, and other devices operating within 1.8V to 12V DC.