Specification: This brand new 1803BK DC motor speed controller Input voltage: 1.8V-15VDC; Maximum output power: 30W; The maximum continuous output current: 2A; Adjustable duty cycle: 0% -100%; Size: 32x32x12mm HIGH-QUALITY MATERIAL: This PWM motor speed controller is made of high-quality circuit board material, which has good durability and strength wear to ensure a long service life. Input Voltage Range: This PWM DC motor speed controller supports a wide input voltage range of 1.8V to 12V DC. Meanwhile, the output current is 0A-2A, ensuring broad application. Safety Protection: The controller is equipped with a self-resetting fuse. If the current is too high, the fuse will automatically break. After cooling, the backup fuse will automatically reset. Wide Application: It is suitable for speed regulation of DC motors, fans, oxygen tube pumps, and other products in DC 1.8V - 12V.