An output of an internal combustion engine is transmitted to an output shaft by controlling a control motor to change a rotation speed output from the engine without speed steps via power distribution planetary gear. The wireless switch module comprises at least one switch cell and at least one control unit. By arranging the images in this way, the remaining blank area of the sheet can be reduced, and the sheet of paper can be used efficiently. A timing unit receives the sensing and the detecting signal to calculate a first and a second period of time, and a discharging time. A first bearing element is located at one end surface of the first and second gears.