Specification: This 1803BK DC Motor Speed Controller Input Power Supply Voltage: 1.8V-15VDC; The maximum output power: 30W; The maximum continuous output current: 2A; Adjustable duty cycle: 0%-; Size: 32x32x12mm MATERIAL: This PWM motor speed controller is made of circuit board material, which has good durability and heat resistance. wear to ensure long-term service life. Input Voltage Range: This PWM speed controller for DC motors supports wide input voltage from 1.8V to 12 V DC. At the same time, the output current is 0A-2A, which guarantees 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 1.8 V - 12V. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.