Specification: This 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: 32x32x12mmHIGH QUALITY MATERIAL: This PWM motor speed controller is made of high quality circuit board material, which has good durability and wear resistance to ensure long-term service life. Input voltage range: This PWM speed controller for DC motors supports wide input voltage from 1.8V to 12V 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 1.8V - 12V.Specifications:Input supply voltage: 1.8V-15VDC The maximum output power: 30WThe maximum continuous output current: 2AAdjustable duty cycle: 0%-100%Size: about 32x32x14mmAttention:Please connect this DC controller to DC power supply. Never connect the device directly to a 220 V AC household power supply, otherwise it will be damaged. The power supply must not exceed 12 V, otherwise it will be damaged. This is a current regulator high 2A which cannot drive more than 0.5A continuous current / the 775 motor / the motor of the children's car. Please confirm again before buying.Package Content:4 x PWM DC Motor Adjustable Speed Controller4 x Button Note: The data are all manual measurement, please allow an error of 1 - 3cm, due to the light and display difference, there will be some color difference, depending on the physical object received.