The tempered glass is a hardened glass, specially made to cover and protect the screen of your mobile phone from scratches and other damages. It does not affect the functionality of the screen. In case of a drop, it does not guarantee that the screen will not break along with it, however, it provides an additional protection. It is 2.5D, which means that its perimeter has rounded edges for a smoother touch experience when using the screen. Useful for modern smartphones with curved screens. It is compatible with iPhone 6 / 6siPhone 4/4s.