This product design customer entrusted our company to lead the appearance and structural design of this project. Considering the industry particularity of this project, we have deeply studied the usage habits and aesthetic characteristics of technicians in optical fiber engineering construction and maintenance units. First of all, considering that the use environment of the product is divided into three types-handheld, placed in the bag, upright and countertop, we have designed related solutions for these three situations to meet the use needs of maintenance technicians in different scenarios; Secondly, considering the industry attributes of the relevant technical personnel occupation-safety, preciseness and stability, we have integrated these industry attributes in the appearance and modeling, the soft rubber part is designed in a symmetrical way, including famous and model brands, using simple design methods to design not simple professional products.