The arc metal back shell is made by top-level precision mould, which presents the original beauty of iPhone and has comfortable hand feeling. With sandwich-type structure design of soft and hard materials, the air cushion edges can effectively reduce impact when failing to provide superior protection to device. Its edges are higher than the screen to protect it against damage when failing. The higher camera edges can protect camera against scratches. The hollow logo and beveled process around camera make it look exquisite and fashionable and enrich product visual effect. Closed buttons prevent key holes from dust and lengthen working time.