2-in-1 function: 37mm filter lens + waterproof diving case

Graduated color filter lens provides a gradual color transition for a smooth blending effect

Waterproof Materials: polycarbonate, ABS plastic, clear plate glass, stainless steel, EPDM rubber and spring loaded O ring sealed buttons

iPhone 7 diving case, IPX8 waterproof level and 1 meter shockproof level; ideal for diving, surfing, snorkeling, skiing, yacht or other underwater activities. Also suitable for rainy, snowy and etc. environment