Compatibility: Suitable for Osmo Action 3, add special effects for your camera, more individuality, is an excellent camera accessory Waterproof: The use of multi layer nano coating process, waterproof, anti oil, anti scratch performance is excellent, in the sun, the light of the lens presented different colors Aluminum Frame Material: carved by , fast fading, dark gray frame, prevent light leakage. is equipped with anti slip gear, easy to install and disassemble, installation will not damage the original lens Adjustable Light: Using the motion camera filter, the light can be adjusted by rotating the gear, allowing us to choose the appropriate luminosity for the photo Light Reduction Effect: Filter can reduce the amount of light, so that the lens can choose the correct exposure value, prevent overexposure, avoid the traditional filter color bias problem, almost colorless bias