【Compatible with Insta360 GO 3S】Specifically designed for Insta360 GO 3S action cameras only. Includes 1x UV filter, 1x CPL filter, and 1x ND4 filter 【UV Filter】The K&F Concept UV filter is a general, daily protector for your Go 3S action camera lens, protects the lens away from dust, stain, and water; Helping reduces haze and minimizes ultraviolet (UV) rays, perfectly for capturing high altitude and snow photos without the bluish cast 【CPL Filter】The polarizing filter effectively reduces glare and reflection from water, glass, foliage, and other nonmetallic surfaces. Rotate the CPL filter to get clear images with more details and increased saturation and contrast. 【ND4 Filter】The ND4 lens filter provides 2-stop light reduction. You can use it on a cloudy day. No color shift. 【Import Optical Glass】Made of top AGC optical glass with double-sided 28 multi-layer coatings, scratch-resistant, and hydrophobic coatings that increase surface hardness and make cleaning easy. lens filter kit