For Insta360 X4 PULUZ 50m Waterproof Sealed Diving Case Features 1. Real machine mold opening, fully suitable for Insta360 X4 action camera. 2. The lens material is PMMA, with a light transmittance of 95%. After coating with AR anti-reflection film, the light transmittance reaches 98%. It has an AS waterproof and anti-fingerprint film, and an AS hard film. The surface hardness is 5H, which is comparable to the hardness of ordinary glass and is anti-fingerprint. scratch scratch; 3. The protective shell is made of hardened PC, scratch-resistant, textured, anti-splash and anti-fingerprint; 4. 360-degree total invisibility, eliminating all blind spots; unique optical spherical lens design, underwater panoramic splicing, can restore a seamless panoramic picture; 5. 50-meter full-body underwater waterproof design, very suitable for diving, snorkeling, swimming and other water sports. 6. Waterproof ring material: Amorphous highly active silica gel 7. Material of the connecting shaft between the main body and the back cover: High hardness 304 stainless steel 8. Button material: Stainless steel Package List 1. Waterproof case x 1 2. Invisible adapter x 1 3. Long screw x 1 4. Small wrench x 1 5. Storage bag x 1 6. Alcohol pack x 3 packs (6 pieces in total) 7. Anti-fog tablets x 4 pack (24 tablets in total)