1. There is no touch screen back cover. It is difficult to set camera parameters after installation. You need to take out the camera to operate. After installing the touch screen back cover, you can still operate the camera without removing it even after the camera is installed. 2. The optical design wraps the lens and increases protection for the waterproof lens, making it easier to focus and restore the clarity of the bare metal lens. 3. Heavy sealing, factory pressure tested. 4. Why use an anti-fog insert? In diving, swimming, skiing, surfing, and mountaineering, sports cameras use waterproof cases. There is a temperature difference between the inside and outside, and aerosol can easily form inside the waterproof case. An anti-fog insert is needed to absorb foggy water vapor and prevent the lens from being blocked by fog. (Can be reused after drying.) 5. Without the touch screen back cover, you must open the waterproof shell to adjust camera parameters. During diving or swimming, this operation is inconvenient. Frequent opening may cause the waterproof shell to fog up or allow water ingress, resulting in unclear footage. Applicable Models: for GoPro Max Material: PC + 316 stainless steel + tempered glass Type: for GoPro Max Waterproof Case Color: As shown Package Contents: 1 set of camera waterproof case (including screw base and anti-fog insert) Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowance is +/- 1-3 cm.