2 n 1 USEThe lens filter is suitable for almost all the smartphones with the clip design. Without the clip, it can also work with the DSLR cameras with 37mm lens thread. 37MM LensThe phone clip design with 37mm lens has a strong grip and can be used to mount any other 37mm filter. With a close-up lens, you can get closer to your subject without actually getting close to it. Adjustable ND FILTER Control the amount of light in the 1 to 9 stepless adjustment.The outer ring can adjust the gray level arbitrarily, and can be transferred from ND2 to 400. FunctionCamera lens Filters are great for removing unwanted reflections from non-metallic surfaces and increase contrast and color saturation. Package IncludeOur package comes with 1Pc ND 2-400 filter, 1Pc Phone Clip, 1Pc small carry box.