The body the shell is made of transmittance acrylic (PMMA) material, capable of supporting great pressure under water 45 meters without distortion and high temperature (80) and low temperature (below 30). If dust every day, drop or dive professional camera can easily deal with. The case is water-resistant shell, add the AF, AR optical coating double-layer transparent lens better, easier to clean and eliminate the risk of scratching the lens. Specifications Color: Black Compatible: Xiaomi YI Action 4K CameraType: Waterproof Case Material: ABS Package Includes: 1x Diving Waterproof Protective Case for Xiaomi YI 4K Action Camera 2 Protective Housing.