Features: Premium Lens --- The lenses are made of PMMA material with 95% light transmission and 98% light transmission with AR anti-reflective coating. There is a layer of AS waterproof anti-fingerprint film and a layer of AS hard film on the lens. The surface hardness is 5H, which is comparable to the hardness of ordinary glass, and has the function of anti-fingerprint and anti-scratch. Hard Shell Protection --- Protective shell casing is made of hardened PC, inside and outside of the 10th young grain added, making the product scratch-resistant, texture, anti-flowering and anti-fingerprints. 360-degree Full Invisibility --- Unique optical spherical lens design, underwater panoramic splicing, can restore a seamless splicing panoramic picture; 360-degree full invisibility, blind spot all eliminated. Designed for Underwater Sports --- 50m/164ft full-body underwater waterproof design, using liquid silicone process, enhanced waterproof function, very suitable for diving, snorkeling, swimming and other water sports. Package Includes --- waterproof housing shell x 1; long screw x 1; Base x 1; Storage bag x 1; Alcohol packs x 3 packs ; Anti-fog sheet x 2 packs