1、1. DN filter: The main function is to reduce the amount of incoming light when the light is too bright so that the camera can select the correct exposure value and avoid overexposure. Using the ND filter can also use a slower shutter speed to shoot some special effects, such as foggy water, light trails at night, etc. When shooting videos in the hot sun, you can reduce the shutter speed through the ND filter, so that the video picture has proper motion blur and looks more comfortable. 2、2. Protect lens: anti-oil, anti-fouling, anti-scratch, effectively protect the lens and drone lens. 3、3. High-definition vision: The multi-layer coating light reduction process is used to restore the real color, ACG optical glass, high-quality lens grinding process, and good physical and chemical properties so that the image is clearer. 4、4. Simple installation: snap-on design, quick replacement, quick disassembly and assembly with one twist and one pull, firm installation, and filter replacement at any time, so that you won't miss the wonderful moment. 5、5. Sturdy and durable: The frame is made of high-quality material, which is light in weight, strong and corrosion-resistant, and has a longer service life. Material: ACG optical glass Size: 2.1*1.7*0.39cm Applicable: Compatible for Mini 3 Pro drone 3* ND Filte