The tempered glass is a hardened glass specifically designed to cover and protect the mobile phone's screen from scratches and other damages. It does not affect the functionality of the screen. In case the phone is dropped, it does not guarantee that the screen won't break along with it, but it offers extra protection. It features adhesive across its entire surface, unlike edge glue glass protectors which only have adhesive on the perimeter, making it easier to apply and ensuring the touch screen functions smoothly. Additionally, it prevents dust from getting underneath, something that can happen with edge glue protectors when the adhesive around the perimeter wears out.