This product is a CPL filter, which is a type of polarizing filter that is used to reduce reflections and glare in photography. It is made of high-quality optical glass and has a multi-coated coating to enhance its clarity and reduce distortion. The CPL filter is designed to fit the DJI Osmo Pocket 3 camera, and it has a magnetic design that makes it easy to attach and remove. It also has a slim frame that does not interfere with the camera's operation. The CPL filter can help to improve the quality of photos taken in bright sunlight, and it can also be used to create dramatic effects in landscape photography. It is a essential accessory for any photographer who owns a DJI Osmo Pocket 3 camera.