Bitplay Add-on Lens for iPhone - Circular Polarizer Lens Filter FINE-TUNE YOUR PHOTOS WITH EASE: You can do everything on iPhone or in image editing except that you can't remove reflections off windows and water. However, with this circular polarizer filter, you can! TERRIFIC FOR VERY SPECIFIC CONDITIONS: Deepening blue skies, reducing glare on reflective surfaces like water or glass have made easy. No longer need to spend a lot of time using Photoshop or image-edit softwares to make your photo better. HOW TO USE: Mount your CPL filter to your SNAP! PRO case, look through the iPhone screen at the blue sky, reflections on water, cars, glass, etc. And then rotate the ring of the filter. While lookig through it and you'll see the magic trick as the image brightens and fades as you turn the filter. HIGH CLARITY & PROFESSIONAL: made of high-grade aluminum construction and high-class glass, this lens gives you clear shots every time, reducing glare and reflection. SECURE ATTACHMENT: The lens is firmly attached to the SNAP! series case by using screws, so you don't need to worry about slipping or dropping the lens anymore. Simeply screw/unscrew to switch between difference lenses and scenes.