1. Main Functions: The CPL lens filter has the functions of waterproof, anti-fouling, oleophobic, and hydrophobic, and the coating dredging layer on the filter surface is easy to clean. 2. Scratch-resistant and Wear-resistant: The filter's hardened layer effectively prevents scratches on the mirror surface and has scratch-resistant and wear-resistant properties. 3. Silicone Protective Ring: The inside of the adapter frame is equipped with a flexible silicone protective ring that can protect the camera lens from damage. 4. CPL Lens Filter: The CPL lens filter is a commonly used filter that can effectively eliminate unnecessary reflections and can eliminate most reflections on non-metallic, non-spherical surfaces. It is commonly used for landscape photography. When shooting the sky, the sky becomes bluer. When shooting the water surface, the reflection of the water surface is eliminated, and the scene under the water surface is photographed to make the entire image clearer and more transparent. 5. Applicable Models: Specially designed for HERO 9, 10 action cameras, the circular polarizing lens filter can effectively improve the shooting effect and meet your requirements.