Replace Filter Quickly: Non destructive and quick installation for quick filter replacement. Drone ND filter is suitable for Mini 3 Pro. Multi Layer Coating: Multi layer nanometer coating process, the lens has waterproof, oil proof, anti fouling and scratch resistant properties. For Video: Decrease the shutter speed so that the video picture has proper motion blur and looks more comfortable. Light and Portable: The ND filter is small in size and easy to carry around, with a storage box, which can be carried in a pocket or backpack. For Picture: In a strong light environment, prevent overexposure, resist scattered light, increase color saturation, make the picture more transparent and beautiful, and achieve large scale effects such as fog like flowing water and night light track.