MY MIRACLE Gradual Color Lens Filter for Cellphone Lens with 37MM Filter Thread &Clip (Blue) It makes the sky, wheat field, beach, sunset, night scene, etc. add more beautiful, more romantic, more varied. Blue gradient lenses are a common gradient lens, shooting in bad weather, or haze weather, gray sky, it is bad enough, with a gradient blue filters, the clarity of the blue sky recovery, so that sky bluer, the clouds whiter, and also does not affect the ground tone, perfect balance. Gradual Color filters provide a complete color transition for a smooth blending effect. Give your landscape and skin texture a more colorful touch. Perfect for changing the mood of a picture. Double threaded allowing additional filters to be screwed one over the other Every MY MIRACLE Product includes a 15-month worry-free warranty!