It is not recommended to buy this product if your phone has dual cameras.
Zomei 37MM Star Filter 6 Line Lens Filter for iPhone Samsung Android Smartphones Product Features

Professional Zomei 37mm Moible Phone Star Filter for Mobile Phone
Star light microscope is a kind of camera filters, centered on markers, points and lines to 4, 6, 8 lines, lines to 8, 16, etc., this is the rules of colorless optical glass surface have to etch a series of parallel lines, produce the effect of light diffraction and the formation of a radiant effect after, this is a shooting stage or at night with the effect of the mirror, can play a great role
Item specifics:
Brand Name:Zomei
Type: Star Filter 6 Line
Package:Yes
Model Number:37mm 6 Line Star Filter
Fit: For iPhone 6/6S 6 Plus /6S Plus iPhone 5 5C 5S 4 4S and most of other smartphones
Inside Caliber: 37mm
Lens Material : Aluminum Allloy + Optical Glass
Color: Black
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Package Contents:
1 x 37mm Star Filter 6 Line
1 x 37mm Clip
1 x product box