Zomei 37MM Professional Camera CPL Circular Polarizer, Fader ND Variable Neutral Density with Clip for iPhone 6S, 6S Plus, Samsung Galaxy, and Android Smartphones 2 in 1 lens clip-on lens kit: ND filter + CPL filter. You can take creative photos simply with your cellphone Material: aluminum alloy for extra durability, optical glass allow you to take high definition pictures CPL filter is great for removing unwanted reflections from non-metallic surfaces such as glass or water, and increasing color saturation ND filters can reduce the intensity of light without appreciably changing its color. Suitable for dynamic screen, waterfalls, streams, fast moving objects, etc Detachable and portable: come with a universal lens clip, compatible with most smartphones. Lightweight and compact, you can carry it anywhere you want