Features: This product can control 2-phase 4-wire stepper motor by motor driver board or IR remote controller. 0-9 shifts adjustable motor speed with digital display. Can control the forward/reverse rotation of the motor. Press the digital buttons of the remote controller to quickly change the motor speed. Drive voltage is DC 4-5V, which can be powered by USB, 5V mobile phone charger and battery. S pecification: Drive voltage: DC 4-6V Drive current: 300-500mA Fit motor: 2-phase 4-wire stepper motor (can drive 3-24V stepper motor to rotate, the motor rotation angle is different) Speed display: 0-9 shifts PCB size: 52*36mm/2.05*1.42in Weight: Approx. 61g/2.1oz Package list: 1 * Stepper Motor Driver Boa rd (Without Battery) 1 * Remote Controller Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering .