Specification: This brand new 1803BK DC motor speed controller Input supply voltage: 1.8V-15VDC; The 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 PCB material, which has good durability and wear resistance to ensure a long-term service life. Input voltage range: This PWM speed controller for DC motors supports a wide input voltage from 1.8V to 12V DC. At the same time, the output current is 0A-2A, which ensures wide application. Safety Protection: The controller is equipped with a self-recovery fuse. If the current is too high, the fuse is automatically cut off. After cooling, the backup is automatically restored. Wide Applications: It is suitable for speed control of DC motors, fans, oxygen cylinder pumps and other products in DC 1.8V - 12V.