This 1803B DC Motor Speed Controller allows controlling the direction of a DC the motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully the product adjust from 0%-100%. With a self-recovery fuse 2A and a Power-On LED light. Enable to provide a continuous current of 2A to your DC motor or other DC load. Input supply voltage: 1.8V-15VDC The max output power: 30W The max continuous output current :2A Duty Cycle adjustable: 0%-100% Size: 32 x 32 x 15mm Material: metal Package Contents: 10 x motor speed controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.