This product is a hand-held phototherapy instrument designed for ZOBOSIN Shenzhen Medical Equipment Company. This instrument is a product for the treatment of aging joints of the elderly, promoting blood circulation and removing blood stasis. In the early stage of market research and analysis, the appearance of this product is too common, the appearance is simple and geometric, and the holding part is not suitable for human use. Therefore, we analyze that the breakthrough point of the appearance of this product is mainly the appearance of science and technology, making the product more visually professional, in some places, metal and acrylic panels are used to cooperate with each other. During the design of the holding part, proofing and modification are carried out many times. The finished product has the best handle and the weight of the product during use is balanced.