Product description: 1, the aviation aluminum body, metal elements architecture concept by oxygen outer extremely oxidation hardened, wear resistance and anti-scrape; 2, the strong and light and simple sense is good; 3, CNC milling machine precision cutting and become, a border around 0.5 mm internal installed with soft mat and the volume button; 4, a border around the 0.5 mm internal installation soft sponge anti-shock pad. Not only to solid density function, but the phone has shock absorption buffer function, can have more perfect protection.