1、Compatibility: Specifically designed for Action4, this filter adapter ring allows your camera to be compatible with 49mm round filters, eliminating the need for multiple filters. 2、Unlock Your Creativity: With the ability to support multiple filter stacking, this filter adapter expands the imaginative possibilities for your photography endeavors. 3、Secure Safety: Equipped with non slip rubber pads and snap on fastening, the adapter features protective rubber pads between the adapter and camera lens to prevent scratches. 4、Enhanced Durability: The sturdy frame of the lens adapter ring enhances light transfer and defends the lens without causing discomfort. 5、Aluminum Alloy Materials: Crafted from aluminum alloy metal, the filter adapter ring boasts a refined and smoothly finish, with the high strength and toughness characteristic of aluminum alloy materials.