The tempered glass is a hardened glass designed to cover and protect your mobile screen from scratches and other damages. It does not affect the functionality of the screen. In case of a fall, there is no guarantee that the screen will not break, but it offers additional protection. It features adhesive across the entire surface, unlike edge glue glass protectors that only have adhesive along their perimeter. This helps with better application and seamless touch screen operation. Additionally, it prevents dust from passing underneath, which can happen with edge glue protectors when the adhesive along the perimeter wears out.