Anti-Blue Light Filter.Approved By Sgs,Blocking Out Up To 49% Of Harmful Blue Light,Relieving Computer Eyestrain. 9H Hardness Glass And 0.33Mm Thick Premium Tempered Glass.Protecting Iphone From Cuts And Scratches. Rounded Edges For Full Coverage.Compatible With Most Cases. Hydrophobic And Stain-Resistant.Oleophobic Screen Coating Againsts Sweat And Oil Residue Or Makeup. Bubble Free And Anti-Fingerprint.Takes Just Seconds To Apply.