The draft made during the internship in the company before, because of the current wireless charging technology, there may be no market for this kind of back-link charging treasure. The iron buckle on the back can be unfolded to buckle the mobile phone while playing and charging, so at that time, I wanted to do it with the feeling of a mobile phone game handle. The first modeling design uses diamond elements to create a tough style, and uses segmentation to highlight the collision feeling between red and black and increase the cool feeling. The second modeling design uses armor elements and matches different materials to show the sense of science and technology under tough lines. At the same time, the arc surface is used to enhance the sense of hierarchy, which is more commercial.