1803BK DC Motor Speed Controller controls the speed of a DC motor by adjusting the Pulse-Width-Modulated (PWM). Can control the motor speed to change from 0 percent to 100 percent, and it is noise-free when the motor is at low speed. Use a 2A resettable fuse to protect the controller. High-efficiency, large torque controller can control motor speed, small heat, has been repeatedly revised, has been widely stable applications in the industry. The built-in power indicator and potentiometer have the function of power switch, which is an ideal choice for controlling motor speed or LED brightness. New and high quality Working voltage: dc1.8v-15v Output current: 0-2a Size: 32*32*14mm Package includes: 1pc Note: Please refer to the measurement. Tiny measuring error is allowable in normal range. There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.