- SPECIFICALLY DESIGNED FOR X4: This housing kit is built for the X4 camera and supports depths up to 50 meters (164 ft). The protective shell is hardened PC, and the lenses are PMMA with 95% light transmittance. It is compression and explosion proof, designed to restore and preserve camera clarity underwater. - SUPERIOR SEALING: High sealing design protects the X4 action camera. The symmetrical lock catch provides strong structural performance. The shell body is thickened for solidity, remains airtight, and minimizes leakage to effectively prevent water ingress. - 360 DEGREE FULL INVISIBILITY: The unique optical spherical lens enables underwater panoramic splicing to form a seamless panoramic picture with 360 degree full invisibility and all blind spots eliminated. - QUICK COMPATIBILITY: Comes with a standard quick release adapter and bottom 1/4 inch interface, usable with other supports, selfie sticks, photography lights, and more. - USE SCENARIOS: - Scuba diving to capture 360-degree underwater scenes at depths up to 50 m. - Snorkeling or reef exploration with handheld or mounted lighting for wide-angle shots. - Underwater filming on a stable setup using supports like tripods or selfie sticks. - KEY ATTRIBUTES: function (depth up to 50 m, compression and explosion proof), compatibility (1/4 inch bottom interface, quick release), size and materials (hardened PC housing, PMMA lenses with 95% light transmittance), performance (airtight, leak-proof).