The appearance design of the VT200 mouse that used to work in Lei Bai is an entry-level flagship game mouse in the style of e-sports. There is a slight difference in palm size between men and women and adults and minors, but hand feel has always been the most essential ergonomic requirement of mouse design. The product as a whole takes the comfort of the grip as the starting point, taking into account the universal design requirements of men and women, and adopts a symmetrical left and right shape design that fits the arc of the human palm, which is small and easy to use, and has good grip comfort. Through the repeated deliberation and verification of the sludge model, the design and treatment of product details can be improved. The design of local non-visual appearance surface is in-depth, such as the layout optimization design of the bottom sticker, etc., which strives to be exquisite, beautiful and intriguing. The mouse has been listed for sale and the market feedback is good.