It's a 60 RMP DC Gear Motor a mechanical system consisting of an electric motor and a gearbox containing a series of gears. The function of the gearbox coupled to the motor is to reduce its speed and increase its torque to do a given job at a given speed. The 60 RPM Dual shaft BO Motor Plastic Gear Motor BO series straight motor gives good torque and RPM at Lower Operating voltage. low-cost geared DC motors which is an alternative to metal gear DC motors. It is most suitable for lightweight robots running on voltages between 3V-12V. Out of its two shafts, one shaft can be connected to the wheel, while the other can be connected to an encoder.