By fixing the mobile phone on the wrist with a lanyard, there will be no problem of dropping the mobile phone; rotate the mobile phone support shaft to adjust the angle, you can put it horizontally or vertically to enjoy the movie; Efficient heat dissipation; install protective pads on the lens and four corners, its buffering effect can prevent the mobile phone from breaking.When shooting, you can fix the mobile phone on the wrist by a lanyard, so there will be no problem of dropping the mobile phone; rotate the mobile phone support shaft to adjust the angle, you can watch it horizontally or vertically; on the back of the mobile phone cover A slot that easily generates heat can be effectively dissipated by convection and radiation; protective pads are installed on the lens and four corners, and its cushioning effect can prevent the mobile phone from being broken and damaged. The lanyard has high toughness and elasticity, and has a good human factor function in use.This patent has completed the production of physical products and has reached the level of commercialization. It can be sold only by adjusting according to user needs. Due to the large number of mobile phone users, We can sell to the general user on the website. We are also negotiating with the mobile phone shell manufacturer Hongqiao Co., Ltd. to negotiate a patent technology licensing contract.