The full face tempered glass by Powertech is a full coverage hardened glass, specially designed to protect your phone's screen from scratches and other damages. In case of a phone drop, it does not guarantee that the screen won't break along with it, but it is an additional protection. It does not affect the screen's functionality. The black border covers the entire surface of the screen, including the edges. It is 5D, which means it has undergone special processing to acquire curved edges that cover the entire surface of the phone screen. This way, it is not apparent that the screen has protection, but the curved edges are also protected. It is compatible with the Xiaomi Redmi 10C/12C.