Polorizing Filter Special Effect Lens for Digital Camera, Cell Phone Camera By Jelly Lens It comes with an adhesive pad that makes it very easy to apply to any camera. It makes different photo effects almost like a lomo camera! It comes with a string hook which allows you to attach to your cell phone or camera. It can be used on top of each other. It does not work on some cell phone and camera. Since they might have a lens cover that prevents the jelly lens from sticking firmly. Or they might have lens that bigger than 1cm in diameter/width.