Our product can largely be classified into 3 things. First, we raise the technology and differentiation of product by designing the visually seen part based on the hydro-dynamic structure making the vortices on the upper plate and the horizontal water release-enabling skill. Second, we developed the semi-automatic switchgear using the principle of gravity and seesaw motion, which removes the bad odor in the bathroom. the flow analysis using the motion of gravity and magnetic motion is the biggest core technology. We developed the switchgear using the magnetic motion and calculated the magnetic flux of magnetic field and ratio of water weight by the skill that broke the balance of power between the magnetic motion and water pressure and let the water flow. It is also the best technology. Finally, it is the skill that developing the air layer to accelerate the water release.