1. [Invisible Dive Case for Insta360 X4]The invisible dive case is compatible for Insta360 ONE X4, with no obstruction in 360 degree shots. Seamless underwater stitching. Ideal for diving, surfing, snorkeling and other water sports activities. 2. [Good Sealing] The underwater diving protective shell for X4 action camera adopts Three - fold buckle design, tighter buckle, not easy to fall off, firmly locked, more secure diving. The shell body is thickened, not easy to deform, High density waterproof ring air tight and no leakage, effectively preventing water from entering the camera. 3. [50m/164ft ]The divie case compatible with Insta360 X4 adopts a professional sealing structure, allowing deep diving waterproof up to 50m/164ft, making it suitable for diving, surfing, snorkeling, and other water sports. 4. [HD Optical Glass]underwater diving shell for Insta360 X4 is adopts Using optical imaging tempered glass, Lens special optical AR coating treatment, light transmission close to 99.9% can clearly penetrate the shooting picture, the shooting picture is not distorted.