Parameters: Operating voltage: DC 12 V Motor type: 28BYJ-48 Driving course: four phases of eight strokes Pitch angle: 5.625x1 / 64 transmission ratio: 1/64 Application: Apply to the monolithic learning machine / to the wind bands driving the air conditioner / adjusting the driving direction of the surveillance cameras, etc. Features: (1) adopts ULN2003 for driving, easy to use (2) with decreasing speed ratio, low noise and good performance (3) Requires only 5V to drive, convenient for SCM developers (4) Apply for the 51 / AVR / ARM platform, necessary for the design and development of robots.