Convenient to use, high-quality stepper motor, with gear reduction, extremely low noise and stable smooth operation. Convenient for MCU developers to use open interface, and can also be used to drive other stepper motors through this board, which is suitable for various platforms such as 51/AVR/AVR/ARM. It is suitable for single chip learning machine learning or air conditioning strip drive and camera monitoring direction adjustment drive. Open interface, also can drive other stepper motor through this board. Motor Model: 28byj-48 Drive Voltage: 12V Driving : four-phase eight-beat Gear Reduction Ratio: 1/64 Specification: Material: alloy Size Chart: Size(L x W x H): Approx.25 x 25 x 20 mm / 0.98 x 0.98 x 0.79 inches Package Includes: 1 Piece Gear Motor Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly 1-3 cm measuring deviation due to manual measurement.