①. High-hardness scratch-resistant glass material: The lens is made of high-aluminum glass with higher hardness, which is not afraid of being scratched by sand and dust in the airflow during flight; The white material base has better light transmittance, ensuring that the picture is color-free during high-speed dive. ②. Metal frame: The frame is made of CNC metal material, which is strong and light, not easy to deform; it can effectively resist impact and prevent the filter from loosening and affecting or falling and losing. ③. ND filter: Reduce the amount of light entering, prevent overexposure of the picture, and keep the dynamic blur natural during high-speed flight. ④. UV filter: Transparent and colorless, physically protect the lens from being scratched by branches/gravel, and present the picture quality without loss. ⑤. Multiple specifications: The set includes UV/ND8/ND16/ND32 lenses of specifications, which can meet most daily use scenarios. ⑥. Name: Filter Kit. ⑦. Applicable: for O4 Air Unit Pro. ⑧. Filter model: UV/ND8/ND16/ND32 Filter. ⑨. The product appearance and printed words depending on the batch, but this does not affect use. ⑩. Colour: As Shown. ⑪. Material: CNC aluminum parts + high aluminum white glass. ⑫. Package Contents: 1 x Filter Kit. Only the above package content, other products are not included. ⑬. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.