Designed for Insta360 X4 action camera, this waterproof case enables diving, snorkeling and other underwater activities while protecting the camera from damage and scratches. It is strong, durable and reliable. The waterproof shell uses a symmetrical lock design for robust structural performance. The thicker shell body improves solidity and resists deformation. Made of high-permeability, corrosion-resistant PC, it provides all-around protection for the camera and lens to prevent scratches. The lens features tempered glass with optical performance. Lens material transparency is about 92% before AR coating, and after AR coating it increases to more than 98%. The coating, along with a waterproof film, yields a water drop angle of 115 degrees to ensure water droplets do not remain on the lens surface and affect shooting. 50M underwater clear shooting HD lens with high light transmission; even at 50 meters depth, it maintains clear and realistic shooting results. Use scenarios: - Deep-water diving or reef snorkeling to capture immersive, scratch-free footage. - Poolside training or surf photography with splash-prone environments. - Underwater exploration and marine life documentation where lens clarity and protection are critical. Compatibility: Insta360 X4. Material: PC shell; lens: tempered glass with AR coating and waterproof film. Performance: reliable protection, high transparency, and 50M depth rating.