The tempered glass from Hurtel is a specially designed hardened glass to cover and protect your mobile screen from scratches and other damages. It does not affect the screen's functionality. In case of a phone drop, it does not guarantee that the screen won't break along with it, but it provides additional protection. It has adhesive over its entire surface, unlike edge glue glasses that have adhesive only on their perimeter. This helps with better fitting and seamless touchscreen operation. It also prevents dust from getting underneath, which can happen with edge glue when the perimeter adhesive wears out. It is compatible with the Galaxy A55.