Red Filter: More than 5 meters underwater video,The red filter is a must-have to restore red that is absorbed by water in natural light.Commonly used in large blue water,with less algae and good water conditions,mostly used in sea water. Magneta Filter: More than 5 meters underwater video,The magenta filter is a must-have to restore the natural light due to the greenish scene caused by algae.Commonly used in scenes where the water quality is greenish, there are many algae plants, and the water quality is good. Yellow Filter: Night underwater video,The yellow filter is a must-have to adjust the searchlight area color. Fit Model: for GoPro Hero 7 Black / Hero (2018) / GoPro Hero 5 Black / GoPro Hero 6 Black Lens Filter: Red + Magenta + Yellow Frame Material: Aviation Aluminum Alloy Lens Material: Optical Glass; Multi-layer Coating Frame: Ultra-thin Frame Package Included: 1x Red Filter 1x Magenta Filter 1x Yellow Filter How to use: You have to remove the lens on the camera and put the filter lens on it instead. Remove lens with counterclockwise twist 45-degrees, then reverse procedure to put on filter lens. Replace with filter lens rotating 45-degrees clockwise.